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Python Reference
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SQL Reference
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MySQL Reference
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PHP Reference
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Java Reference
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C Reference
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C++ Reference
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Django Reference
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ASP Reference
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Node.js Reference
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XML Reference
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HTML
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CSS
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Exercise
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Quiz
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SciPy
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Exercise
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Excel
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Exercise
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What is an Exercise?
| https://www.w3schools.com/exercises/index.php |
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What is a Quiz?
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JavaScript
| https://www.w3schools.com/js/js_exercises.asp |
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React
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jQuery
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Python
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SQL
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MySQL
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PHP
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Java
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Kotlin
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Django
| https://www.w3schools.com/django/django_exercises.php |
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Node.js
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PostgreSQL
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TypeScript
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Bash
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Go
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MongoDB
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DSA
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NumPy
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Exercise
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Pandas
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SciPy
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What is a Quiz?
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| Min and Max Array | https://www.w3schools.com/java/java_howto_min_max_array.asp |
| Merge Two Arrays | https://www.w3schools.com/java/java_howto_merge_two_arrays.asp |
| Remove Duplicates | https://www.w3schools.com/java/java_howto_remove_duplicates_array.asp |
| Find Duplicates | https://www.w3schools.com/java/java_howto_duplicate_elements_array.asp |
| Shuffle an Array | https://www.w3schools.com/java/java_howto_shuffle_array.asp |
| Factorial of a Number | https://www.w3schools.com/java/java_howto_factorial.asp |
| Fibonacci Sequence | https://www.w3schools.com/java/java_howto_fibonacci.asp |
| Find GCD | https://www.w3schools.com/java/java_howto_find_gcd.asp |
| Check Prime Number | https://www.w3schools.com/java/java_howto_check_prime_num.asp |
| ArrayList Loop | https://www.w3schools.com/java/java_howto_loop_through_arraylist.asp |
| HashMap Loop | https://www.w3schools.com/java/java_howto_loop_through_hashmap.asp |
| Loop Through an Enum | https://www.w3schools.com/java/java_howto_loop_through_enum.asp |
| Java Reference | https://www.w3schools.com/java/java_ref_reference.asp |
| Java Keywords | https://www.w3schools.com/java/java_ref_keywords.asp |
| assert | https://www.w3schools.com/java/ref_keyword_assert.asp |
| abstract | https://www.w3schools.com/java/ref_keyword_abstract.asp |
| boolean | https://www.w3schools.com/java/ref_keyword_boolean.asp |
| break | https://www.w3schools.com/java/ref_keyword_break.asp |
| byte | https://www.w3schools.com/java/ref_keyword_byte.asp |
| case | https://www.w3schools.com/java/ref_keyword_case.asp |
| catch | https://www.w3schools.com/java/ref_keyword_catch.asp |
| char | https://www.w3schools.com/java/ref_keyword_char.asp |
| class | https://www.w3schools.com/java/ref_keyword_class.asp |
| continue | https://www.w3schools.com/java/ref_keyword_continue.asp |
| default | https://www.w3schools.com/java/ref_keyword_default.asp |
| do | https://www.w3schools.com/java/ref_keyword_do.asp |
| double | https://www.w3schools.com/java/ref_keyword_double.asp |
| else | https://www.w3schools.com/java/ref_keyword_else.asp |
| enum | https://www.w3schools.com/java/ref_keyword_enum.asp |
| exports | https://www.w3schools.com/java/ref_keyword_exports.asp |
| extends | https://www.w3schools.com/java/ref_keyword_extends.asp |
| final | https://www.w3schools.com/java/ref_keyword_final.asp |
| finally | https://www.w3schools.com/java/ref_keyword_finally.asp |
| float | https://www.w3schools.com/java/ref_keyword_float.asp |
| for | https://www.w3schools.com/java/ref_keyword_for.asp |
| if | https://www.w3schools.com/java/ref_keyword_if.asp |
| implements | https://www.w3schools.com/java/ref_keyword_implements.asp |
| import | https://www.w3schools.com/java/ref_keyword_import.asp |
| instanceof | https://www.w3schools.com/java/ref_keyword_instanceof.asp |
| int | https://www.w3schools.com/java/ref_keyword_int.asp |
| interface | https://www.w3schools.com/java/ref_keyword_interface.asp |
| long | https://www.w3schools.com/java/ref_keyword_long.asp |
| module | https://www.w3schools.com/java/ref_keyword_module.asp |
| native | https://www.w3schools.com/java/ref_keyword_native.asp |
| new | https://www.w3schools.com/java/ref_keyword_new.asp |
| package | https://www.w3schools.com/java/ref_keyword_package.asp |
| private | https://www.w3schools.com/java/ref_keyword_private.asp |
| protected | https://www.w3schools.com/java/ref_keyword_protected.asp |
| public | https://www.w3schools.com/java/ref_keyword_public.asp |
| return | https://www.w3schools.com/java/ref_keyword_return.asp |
| requires | https://www.w3schools.com/java/ref_keyword_requires.asp |
| short | https://www.w3schools.com/java/ref_keyword_short.asp |
| static | https://www.w3schools.com/java/ref_keyword_static.asp |
| super | https://www.w3schools.com/java/ref_keyword_super.asp |
| switch | https://www.w3schools.com/java/ref_keyword_switch.asp |
| synchronized | https://www.w3schools.com/java/ref_keyword_synchronized.asp |
| this | https://www.w3schools.com/java/ref_keyword_this.asp |
| throw | https://www.w3schools.com/java/ref_keyword_throw.asp |
| throws | https://www.w3schools.com/java/ref_keyword_throws.asp |
| transient | https://www.w3schools.com/java/ref_keyword_transient.asp |
| try | https://www.w3schools.com/java/ref_keyword_try.asp |
| var | https://www.w3schools.com/java/ref_keyword_var.asp |
| void | https://www.w3schools.com/java/ref_keyword_void.asp |
| volatile | https://www.w3schools.com/java/ref_keyword_volatile.asp |
| while | https://www.w3schools.com/java/ref_keyword_while.asp |
| Java String Methods | https://www.w3schools.com/java/java_ref_string.asp |
| charAt() | https://www.w3schools.com/java/ref_string_charat.asp |
| codePointAt() | https://www.w3schools.com/java/ref_string_codepointat.asp |
| codePointBefore() | https://www.w3schools.com/java/ref_string_codepointbefore.asp |
| codePointCount() | https://www.w3schools.com/java/ref_string_codepointcount.asp |
| compareTo() | https://www.w3schools.com/java/ref_string_compareto.asp |
| compareToIgnoreCase() | https://www.w3schools.com/java/ref_string_comparetoignorecase.asp |
| concat() | https://www.w3schools.com/java/ref_string_concat.asp |
| contains() | https://www.w3schools.com/java/ref_string_contains.asp |
| contentEquals() | https://www.w3schools.com/java/ref_string_contentequals.asp |
| copyValueOf() | https://www.w3schools.com/java/ref_string_copyvalueof.asp |
| endsWith() | https://www.w3schools.com/java/ref_string_endswith.asp |
| equals() | https://www.w3schools.com/java/ref_string_equals.asp |
| equalsIgnoreCase() | https://www.w3schools.com/java/ref_string_equalsignorecase.asp |
| format() | https://www.w3schools.com/java/ref_string_format.asp |
| getBytes() | https://www.w3schools.com/java/ref_string_getbytes.asp |
| getChars() | https://www.w3schools.com/java/ref_string_getchars.asp |
| hashCode() | https://www.w3schools.com/java/ref_string_hashcode.asp |
| indexOf() | https://www.w3schools.com/java/ref_string_indexof.asp |
| isEmpty() | https://www.w3schools.com/java/ref_string_isempty.asp |
| join() | https://www.w3schools.com/java/ref_string_join.asp |
| lastIndexOf() | https://www.w3schools.com/java/ref_string_lastindexof.asp |
| length() | https://www.w3schools.com/java/ref_string_length.asp |
| matches() | https://www.w3schools.com/java/ref_string_matches.asp |
| offsetByCodePoints() | https://www.w3schools.com/java/ref_string_offsetbycodepoints.asp |
| regionMatches() | https://www.w3schools.com/java/ref_string_regionmatches.asp |
| replace() | https://www.w3schools.com/java/ref_string_replace.asp |
| replaceAll() | https://www.w3schools.com/java/ref_string_replaceall.asp |
| replaceFirst() | https://www.w3schools.com/java/ref_string_replacefirst.asp |
| split() | https://www.w3schools.com/java/ref_string_split.asp |
| startsWith() | https://www.w3schools.com/java/ref_string_startswith.asp |
| subSequence() | https://www.w3schools.com/java/ref_string_subsequence.asp |
| substring() | https://www.w3schools.com/java/ref_string_substring.asp |
| toCharArray() | https://www.w3schools.com/java/ref_string_tochararray.asp |
| toLowerCase() | https://www.w3schools.com/java/ref_string_tolowercase.asp |
| toString() | https://www.w3schools.com/java/ref_string_tostring.asp |
| toUpperCase() | https://www.w3schools.com/java/ref_string_touppercase.asp |
| trim() | https://www.w3schools.com/java/ref_string_trim.asp |
| valueOf() | https://www.w3schools.com/java/ref_string_valueof.asp |
| Java Math Methods | https://www.w3schools.com/java/java_ref_math.asp |
| abs() | https://www.w3schools.com/java/ref_math_abs.asp |
| acos() | https://www.w3schools.com/java/ref_math_acos.asp |
| addExact() | https://www.w3schools.com/java/ref_math_addexact.asp |
| asin() | https://www.w3schools.com/java/ref_math_asin.asp |
| atan() | https://www.w3schools.com/java/ref_math_atan.asp |
| atan2() | https://www.w3schools.com/java/ref_math_atan2.asp |
| cbrt() | https://www.w3schools.com/java/ref_math_cbrt.asp |
| ceil() | https://www.w3schools.com/java/ref_math_ceil.asp |
| copySign() | https://www.w3schools.com/java/ref_math_copysign.asp |
| cos() | https://www.w3schools.com/java/ref_math_cos.asp |
| cosh() | https://www.w3schools.com/java/ref_math_cosh.asp |
| decrementExact() | https://www.w3schools.com/java/ref_math_decrementexact.asp |
| exp() | https://www.w3schools.com/java/ref_math_exp.asp |
| expm1() | https://www.w3schools.com/java/ref_math_expm1.asp |
| floor() | https://www.w3schools.com/java/ref_math_floor.asp |
| floorDiv() | https://www.w3schools.com/java/ref_math_floordiv.asp |
| floorMod() | https://www.w3schools.com/java/ref_math_floormod.asp |
| getExponent() | https://www.w3schools.com/java/ref_math_getexponent.asp |
| hypot() | https://www.w3schools.com/java/ref_math_hypot.asp |
| IEEEremainder() | https://www.w3schools.com/java/ref_math_ieeeremainder.asp |
| incrementExact() | https://www.w3schools.com/java/ref_math_incrementexact.asp |
| log() | https://www.w3schools.com/java/ref_math_log.asp |
| log10() | https://www.w3schools.com/java/ref_math_log10.asp |
| log1p() | https://www.w3schools.com/java/ref_math_log1p.asp |
| max() | https://www.w3schools.com/java/ref_math_max.asp |
| min() | https://www.w3schools.com/java/ref_math_min.asp |
| multiplyExact() | https://www.w3schools.com/java/ref_math_multiplyexact.asp |
| negateExact() | https://www.w3schools.com/java/ref_math_negateexact.asp |
| nextAfter() | https://www.w3schools.com/java/ref_math_nextafter.asp |
| nextDown() | https://www.w3schools.com/java/ref_math_nextdown.asp |
| nextUp() | https://www.w3schools.com/java/ref_math_nextup.asp |
| pow() | https://www.w3schools.com/java/ref_math_pow.asp |
| random() | https://www.w3schools.com/java/ref_math_random.asp |
| rint() | https://www.w3schools.com/java/ref_math_rint.asp |
| round() | https://www.w3schools.com/java/ref_math_round.asp |
| scalb() | https://www.w3schools.com/java/ref_math_scalb.asp |
| signum() | https://www.w3schools.com/java/ref_math_signum.asp |
| sin() | https://www.w3schools.com/java/ref_math_sin.asp |
| sinh() | https://www.w3schools.com/java/ref_math_sinh.asp |
| sqrt() | https://www.w3schools.com/java/ref_math_sqrt.asp |
| subtractExact() | https://www.w3schools.com/java/ref_math_subtractexact.asp |
| tan() | https://www.w3schools.com/java/ref_math_tan.asp |
| tanh() | https://www.w3schools.com/java/ref_math_tanh.asp |
| toDegrees() | https://www.w3schools.com/java/ref_math_todegrees.asp |
| toIntExact() | https://www.w3schools.com/java/ref_math_tointexact.asp |
| toRadians() | https://www.w3schools.com/java/ref_math_toradians.asp |
| ulp() | https://www.w3schools.com/java/ref_math_ulp.asp |
| Java Output Methods | https://www.w3schools.com/java/java_ref_output.asp |
| print() | https://www.w3schools.com/java/ref_output_print.asp |
| printf() | https://www.w3schools.com/java/ref_output_printf.asp |
| println() | https://www.w3schools.com/java/ref_output_println.asp |
| Java Arrays Methods | https://www.w3schools.com/java/java_ref_arrays.asp |
| compare() | https://www.w3schools.com/java/ref_arrays_compare.asp |
| equals() | https://www.w3schools.com/java/ref_arrays_equals.asp |
| sort() | https://www.w3schools.com/java/ref_arrays_sort.asp |
| fill() | https://www.w3schools.com/java/ref_arrays_fill.asp |
| length | https://www.w3schools.com/java/ref_arrays_length.asp |
| Java ArrayList Methods | https://www.w3schools.com/java/java_ref_arraylist.asp |
| add() | https://www.w3schools.com/java/ref_arraylist_add.asp |
| addAll() | https://www.w3schools.com/java/ref_arraylist_addall.asp |
| clear() | https://www.w3schools.com/java/ref_arraylist_clear.asp |
| clone() | https://www.w3schools.com/java/ref_arraylist_clone.asp |
| contains | https://www.w3schools.com/java/ref_arraylist_contains.asp |
| ensureCapacity() | https://www.w3schools.com/java/ref_arraylist_ensurecapacity.asp |
| forEach() | https://www.w3schools.com/java/ref_arraylist_foreach.asp |
| get() | https://www.w3schools.com/java/ref_arraylist_get.asp |
| indexOf() | https://www.w3schools.com/java/ref_arraylist_indexof.asp |
| isEmpty() | https://www.w3schools.com/java/ref_arraylist_isempty.asp |
| iterator() | https://www.w3schools.com/java/ref_arraylist_iterator.asp |
| lastIndexOf() | https://www.w3schools.com/java/ref_arraylist_lastindexof.asp |
| listIterator() | https://www.w3schools.com/java/ref_arraylist_listiterator.asp |
| remove() | https://www.w3schools.com/java/ref_arraylist_remove.asp |
| removeAll() | https://www.w3schools.com/java/ref_arraylist_removeall.asp |
| removeIf() | https://www.w3schools.com/java/ref_arraylist_removeif.asp |
| replaceAll() | https://www.w3schools.com/java/ref_arraylist_replaceall.asp |
| retainAll() | https://www.w3schools.com/java/ref_arraylist_retainall.asp |
| set() | https://www.w3schools.com/java/ref_arraylist_set.asp |
| size() | https://www.w3schools.com/java/ref_arraylist_size.asp |
| sort() | https://www.w3schools.com/java/ref_arraylist_sort.asp |
| spliterator() | https://www.w3schools.com/java/ref_arraylist_spliterator.asp |
| subList() | https://www.w3schools.com/java/ref_arraylist_sublist.asp |
| toArray() | https://www.w3schools.com/java/ref_arraylist_toarray.asp |
| trimToSize() | https://www.w3schools.com/java/ref_arraylist_trimtosize.asp |
| Java LinkedList Methods | https://www.w3schools.com/java/java_ref_linkedlist.asp |
| add() | https://www.w3schools.com/java/ref_linkedlist_add.asp |
| addAll() | https://www.w3schools.com/java/ref_linkedlist_addall.asp |
| clear() | https://www.w3schools.com/java/ref_linkedlist_clear.asp |
| clone() | https://www.w3schools.com/java/ref_linkedlist_clone.asp |
| contains | https://www.w3schools.com/java/ref_linkedlist_contains.asp |
| forEach() | https://www.w3schools.com/java/ref_linkedlist_foreach.asp |
| get() | https://www.w3schools.com/java/ref_linkedlist_get.asp |
| getFirst() | https://www.w3schools.com/java/ref_linkedlist_getfirst.asp |
| getLast() | https://www.w3schools.com/java/ref_linkedlist_getlast.asp |
| indexOf() | https://www.w3schools.com/java/ref_linkedlist_indexof.asp |
| isEmpty() | https://www.w3schools.com/java/ref_linkedlist_isempty.asp |
| iterator() | https://www.w3schools.com/java/ref_linkedlist_iterator.asp |
| lastIndexOf() | https://www.w3schools.com/java/ref_linkedlist_lastindexof.asp |
| listIterator() | https://www.w3schools.com/java/ref_linkedlist_listiterator.asp |
| remove() | https://www.w3schools.com/java/ref_linkedlist_remove.asp |
| removeAll() | https://www.w3schools.com/java/ref_linkedlist_removeall.asp |
| removeFirst() | https://www.w3schools.com/java/ref_linkedlist_removefirst.asp |
| removeIf() | https://www.w3schools.com/java/ref_linkedlist_removeif.asp |
| removeLast() | https://www.w3schools.com/java/ref_linkedlist_removelast.asp |
| replaceAll() | https://www.w3schools.com/java/ref_linkedlist_replaceall.asp |
| retainAll() | https://www.w3schools.com/java/ref_linkedlist_retainall.asp |
| set() | https://www.w3schools.com/java/ref_linkedlist_set.asp |
| size() | https://www.w3schools.com/java/ref_linkedlist_size.asp |
| sort() | https://www.w3schools.com/java/ref_linkedlist_sort.asp |
| spliterator() | https://www.w3schools.com/java/ref_linkedlist_spliterator.asp |
| subList() | https://www.w3schools.com/java/ref_linkedlist_sublist.asp |
| toArray() | https://www.w3schools.com/java/ref_linkedlist_toarray.asp |
| Java HashMap Methods | https://www.w3schools.com/java/java_ref_hashmap.asp |
| clear() | https://www.w3schools.com/java/ref_hashmap_clear.asp |
| clone() | https://www.w3schools.com/java/ref_hashmap_clone.asp |
| compute() | https://www.w3schools.com/java/ref_hashmap_compute.asp |
| computeIfAbsent() | https://www.w3schools.com/java/ref_hashmap_computeifabsent.asp |
| computeIfPresent() | https://www.w3schools.com/java/ref_hashmap_computeifpresent.asp |
| containsKey() | https://www.w3schools.com/java/ref_hashmap_containskey.asp |
| containsValue() | https://www.w3schools.com/java/ref_hashmap_containsvalue.asp |
| entrySet() | https://www.w3schools.com/java/ref_hashmap_entryset.asp |
| forEach() | https://www.w3schools.com/java/ref_hashmap_foreach.asp |
| get() | https://www.w3schools.com/java/ref_hashmap_get.asp |
| getOrDefault() | https://www.w3schools.com/java/ref_hashmap_getordefault.asp |
| isEmpty() | https://www.w3schools.com/java/ref_hashmap_isempty.asp |
| keySet() | https://www.w3schools.com/java/ref_hashmap_keyset.asp |
| merge() | https://www.w3schools.com/java/ref_hashmap_merge.asp |
| put() | https://www.w3schools.com/java/ref_hashmap_put.asp |
| putAll() | https://www.w3schools.com/java/ref_hashmap_putall.asp |
| putIfAbsent() | https://www.w3schools.com/java/ref_hashmap_putifabsent.asp |
| remove() | https://www.w3schools.com/java/ref_hashmap_remove.asp |
| replace() | https://www.w3schools.com/java/ref_hashmap_replace.asp |
| replaceAll() | https://www.w3schools.com/java/ref_hashmap_replaceall.asp |
| size() | https://www.w3schools.com/java/ref_hashmap_size.asp |
| values() | https://www.w3schools.com/java/ref_hashmap_values.asp |
| Java Scanner Methods | https://www.w3schools.com/java/java_ref_scanner.asp |
| close() | https://www.w3schools.com/java/ref_scanner_close.asp |
| delimiter() | https://www.w3schools.com/java/ref_scanner_delimiter.asp |
| findInLine() | https://www.w3schools.com/java/ref_scanner_findinline.asp |
| findWithinHorizon() | https://www.w3schools.com/java/ref_scanner_findwithinhorizon.asp |
| hasNext() | https://www.w3schools.com/java/ref_scanner_hasnext.asp |
| hasNextBoolean() | https://www.w3schools.com/java/ref_scanner_hasnextboolean.asp |
| hasNextByte() | https://www.w3schools.com/java/ref_scanner_hasnextbyte.asp |
| hasNextDouble() | https://www.w3schools.com/java/ref_scanner_hasnextdouble.asp |
| hasNextFloat() | https://www.w3schools.com/java/ref_scanner_hasnextfloat.asp |
| hasNextInt() | https://www.w3schools.com/java/ref_scanner_hasnextint.asp |
| hasNextLine() | https://www.w3schools.com/java/ref_scanner_hasnextline.asp |
| hasNextLong() | https://www.w3schools.com/java/ref_scanner_hasnextlong.asp |
| hasNextShort() | https://www.w3schools.com/java/ref_scanner_hasnextshort.asp |
| locale() | https://www.w3schools.com/java/ref_scanner_locale.asp |
| next() | https://www.w3schools.com/java/ref_scanner_next.asp |
| nextBoolean() | https://www.w3schools.com/java/ref_scanner_nextboolean.asp |
| nextByte() | https://www.w3schools.com/java/ref_scanner_nextbyte.asp |
| nextDouble() | https://www.w3schools.com/java/ref_scanner_nextdouble.asp |
| nextFloat() | https://www.w3schools.com/java/ref_scanner_nextfloat.asp |
| nextInt() | https://www.w3schools.com/java/ref_scanner_nextint.asp |
| nextLine() | https://www.w3schools.com/java/ref_scanner_nextline.asp |
| nextLong() | https://www.w3schools.com/java/ref_scanner_nextlong.asp |
| nextShort() | https://www.w3schools.com/java/ref_scanner_nextshort.asp |
| radix() | https://www.w3schools.com/java/ref_scanner_radix.asp |
| reset() | https://www.w3schools.com/java/ref_scanner_reset.asp |
| useDelimiter() | https://www.w3schools.com/java/ref_scanner_usedelimiter.asp |
| useLocale() | https://www.w3schools.com/java/ref_scanner_uselocale.asp |
| useRadix() | https://www.w3schools.com/java/ref_scanner_useradix.asp |
| Java File Methods | https://www.w3schools.com/java/java_ref_file.asp |
| Java FileInputStream | https://www.w3schools.com/java/java_ref_fileinputstream.asp |
| Java FileOutputStream | https://www.w3schools.com/java/java_ref_fileoutputstream.asp |
| Java BufferedReader | https://www.w3schools.com/java/java_ref_bufferedreader.asp |
| Java BufferedWriter | https://www.w3schools.com/java/java_ref_bufferedwriter.asp |
| Java Iterator Methods | https://www.w3schools.com/java/java_ref_iterators.asp |
| Java Collections Methods | https://www.w3schools.com/java/java_ref_collections.asp |
| Java System Methods | https://www.w3schools.com/java/java_ref_system.asp |
| Java Errors & Exceptions | https://www.w3schools.com/java/java_ref_errors.asp |
| Java Examples | https://www.w3schools.com/java/java_examples.asp |
| Java Videos | https://www.w3schools.com/java/java_videos.asp |
| Java Compiler | https://www.w3schools.com/java/java_compiler.asp |
| Java Exercises | https://www.w3schools.com/java/java_exercises.asp |
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