René's URL Explorer Experiment

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{"@context":"http:\/\/schema.org","@type":"Article","dateCreated":"2016-01-18T11:00:30+02:00","datePublished":"2016-01-18T11:00:30+02:00","dateModified":"2019-03-19T14:05:14+02:00","headline":"Lwjgl Tutorial","name":"Lwjgl Tutorial","keywords":"LWJGL","url":"https:\/\/examples.javacodegeeks.com\/java-development\/core-java\/lwjgl-tutorial\/","description":"LWJGL, which stands for Lightweight Java Game Library, it's a library wrapper that allows us the use of OpenGL and OpenAL from Java. In this tutorial we are going to download the library, configure it","copyrightYear":"2016","articleSection":"Core Java","articleBody":"LWJGL, which stands for Lightweight Java Game Library, it's a library wrapper that allows us the use of OpenGL and OpenAL from Java. In this tutorial we are going to download the library, configure it on eclipse and create a window and setup a bare bones game loop to draw a basic shape with some animation.\n\nLWJGL is the library used in very popular Java games like Minecraft, Spiral Knights, Project Zomboid, Starsector and go on, because LWJGL is a low level library used in other popular high level libraries like LibGDX and Slick2D. At the moment LWJGL is on version 3 with lots of cool improvements and now using GLFW, a low level OpenGl window and input library.\n \n \n \n\n1. The tools\n\n \tJava JDK 8\n \tLatest Eclipse Mars\n \tLWJGL 3\n\n2. Introduction\nThe minimum LWJGL application is an application that checks if your system have OpenGL available and opens a window with some drawing, most modern computers have support for OpenGL on the integrated cards, but for backwards compatibility I am going to stick this example to the OpenGL 1.1 implementation because some cards only have support for that version of the library, as a wrapper LWJGL relies on native libraries and allow us to use Java to make graphics applications with great performance.\n\nLWJGL is open source under BSD license that allows you make commercial games without strings attached, low level bindings with uncompromised performance in the excellent Java ecosystem make it a great library to make the next top game of the year, also with a great community and extensive documentation.\n3. Prerequisites\n\n \tJDK installed\n \tEclipse Mars installed and working\n\n4. Download LWJGL\nGo to Download LWJGL and get the stable version of the library:\n\n\n\nYou got a zip file with the jar, the documentation, the sources and the native libraries, uncompress it on a place where you can find it easy and start eclipse for the next step.\n5. Configure eclipse\n5.1 Create project\nCreate a new standard Java project.\n\n\n5.2 Name\nWrite the name of the project and hit next.\n\n\n5.3 External JARs\nNow in the Libraries tab push [Add External JARs...].\n\n\n\nLocate the lwjgl.jar inside the jar directory into the folder you create earlier and open it.\n5.4 Configure the library\nAdd the documentation, the source and most important add the native library location to your eclipse library because whitout the native library the project won't run, just open lwjgl.jar tree and select each item and hit edit then locate te proper path in each case.\n\n\n5.5 Finish configuration\nNow hit finish and we are ready to begin coding.\n6. Create a package and a java class\nBy convention we create a Java package named example and a class HelloLWJGL. Now we have:\n\nHelloLWJGL.java\npackage example;\n\npublic class HelloLWJGL \n{\n\n}\n\n7. Coding the example\n\n7.1 the variables\nVariables\n    private GLFWErrorCallback errorCallback;\n    private GLFWKeyCallback   keyCallback;\n \n    private long window;\n \n    private float sp = 0.0f;\n    private boolean swapcolor = false;\n\nGLFWErrorCallback and GLFWKeyCallback are used by GLFWE that is our window manager. window is a handler of the window of our application used by GLFWE to manage the lifetime of the window. private float sp = 0.0f; and private boolean swapcolor = false; are variables used to control our animation.\n7.2 Init method\nin our Init method we try to create the application window, set the properties of the window and show the window.\n\nInit method\n    private void init() {\n        glfwSetErrorCallback(errorCallback = GLFWErrorCallback.createPrint(System.err));\n \n        if ( glfwInit() != GLFW_TRUE )\n            throw new IllegalStateException(\"Unable to initialize GLFW\");\n \n        glfwDefaultWindowHints();\n        glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);\n        glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);\n \n        int WIDTH = 300;\n        int HEIGHT = 300;\n \n        window = glfwCreateWindow(WIDTH, HEIGHT, \"Hello LWJGL3\", NULL, NULL);\n        if ( window == NULL )\n            throw new RuntimeException(\"Failed to create the GLFW window\");\n \n        glfwSetKeyCallback(window, keyCallback = new GLFWKeyCallback() {\n            @Override\n            public void invoke(long window, int key, int scancode, int action, int mods) {\n                if ( key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE )\n                    glfwSetWindowShouldClose(window, GLFW_TRUE);\n            }\n        });\n \n        GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());\n        glfwSetWindowPos(\n            window,\n            (vidmode.width() - WIDTH) \/ 2,\n            (vidmode.height() - HEIGHT) \/ 2\n        );\n \n        glfwMakeContextCurrent(window);\n        glfwSwapInterval(1);\n        glfwShowWindow(window);\n    }\n\nSet GLFW error callback\n       glfwSetErrorCallback(errorCallback = GLFWErrorCallback.createPrint(System.err));\n\nSet a callback function as a handler used by GLFW to handle errors.\n\nInit GLFW\n        if ( glfwInit() != GLFW_TRUE )\n            throw new IllegalStateException(\"Unable to initialize GLFW\");\n\nTry to initialize the window system and throw an error otherwise.\n\nWindow hints\n        glfwDefaultWindowHints();\n        glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);\n        glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);\n\nsetup the main window behavior, make it non resizable and hidden at the moment.\n\nCreate window\n        int WIDTH = 300;\n        int HEIGHT = 300;\n \n        window = glfwCreateWindow(WIDTH, HEIGHT, \"Hello LWJGL3\", NULL, NULL);\n        if ( window == NULL )\n            throw new RuntimeException(\"Failed to create the GLFW window\");\n\ndeclare two variables to define the window dimensions next we try to create te window and throw an error if GLFW cannot create it.\n\nInit input\n        glfwSetKeyCallback(window, keyCallback = new GLFWKeyCallback() {\n            @Override\n            public void invoke(long window, int key, int scancode, int action, int mods) {\n                if ( key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE )\n                    glfwSetWindowShouldClose(window, GLFW_TRUE);\n            }\n        });\n\nGLFW handles the input of our application so we instruct it to handle all inputs and manage if our application can be closeable.\n\nDetect video mode\n        GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());\n        glfwSetWindowPos(\n            window,\n            (vidmode.width() - WIDTH) \/ 2,\n            (vidmode.height() - HEIGHT) \/ 2\n        );\n\nGLFW detects the video mode of our graphics system next knowing that we center the window on the screen.\n\nGLFW aditional configuration\n        glfwMakeContextCurrent(window);\n        glfwSwapInterval(1);\n        glfwShowWindow(window);\n\nat last we set the drawing context to the window we created, ths swap interval and show the window that was hidden, the context is where the application is going to draw and the interval is how many back buffers are created before the application refresh the front buffer.\n7.3 Update and Render\nThe Update method is used to calculate the next steep of the animation.\n\nUpdate\n    private void update()\n    {\n    \tsp = sp+0.001f;\n    \tif(sp > 1.0f)\n    \t{\n    \t\tsp = 0.0f;\n    \t\tswapcolor = !swapcolor;\n    \t}\n    }\n\nThe application draws a square and make it bigger until it fills the screen, in sp we store the size of that square, and swapcolor tells the application what color is used to draw the square.\n\nRender\n    private void render()\n    {\n    \tdrawQuad();\n    }\n\nRender calls the drawQuad() function, maybe you can put the code here but to make things clear I made a separate function, the render code is where you draw all your stuff and can be very complicated when the application grows.\n\ndrawQuad\n    private void drawQuad()\n    {\n\t\tif(!swapcolor)\n\t\t{\n\t    \tglColor3f(0.0f, 1.0f, 0.0f);\n\t\t}\n\t\telse\n\t\t{\n\t    \tglColor3f(0.0f, 0.0f, 1.0f);\n\t\t}\n\t\tglBegin(GL_QUADS);\n\t\t{\n\t\t\tglVertex3f(-sp, -sp, 0.0f);\n\t\t\tglVertex3f(sp, -sp, 0.0f);\n\t\t\tglVertex3f(sp, sp, 0.0f);\n\t\t\tglVertex3f(-sp, sp, 0.0f);\n\t\t}\n\t\tglBegin(GL_QUADS);\n    }\n\nWe use the variables updated before to draw our shapes, here we only draw a simple shape but you can draw a lot of stuff, points, triangles, lines, textures and whatever OpenGL allows you to draw and the limit of this is the videocard memory. We set the color to draw and the drawing procedure use that color in this case we set the color with glColor3f(R, G, B); with floats and RGB, RGB is a computer standard red, green, blue in other worlds the amount of each color that we use to get the color we want.\n\nInside the glBegin(GL_QUADS);\/glBegin(GL_QUADS); block we are instructing OpenGL that the drawing operation is a quad and OpenGL expects you define the four vertexes that conforms that quad and thats we do with the glVertex3f(x, y, z);, it defines a vertex in the 3D space, in our case we only use x,y because the example only draw a square but with OpenGL you can draw in 3D, load models and do lot of nice things to make your game.\n7.4 Main loop\nThe main loop is the classic way of make animations and games:\n\nLoop Method\n\tprivate void loop() {\n\t\tGL.createCapabilities();\n\t\tSystem.out.println(\"----------------------------\");\n\t\tSystem.out.println(\"OpenGL Version : \" + glGetString(GL_VERSION));\n\t\tSystem.out.println(\"OpenGL Max Texture Size : \" + glGetInteger(GL_MAX_TEXTURE_SIZE));\n\t\tSystem.out.println(\"OpenGL Vendor : \" + glGetString(GL_VENDOR));\n\t\tSystem.out.println(\"OpenGL Renderer : \" + glGetString(GL_RENDERER));\n\t\tSystem.out.println(\"OpenGL Extensions supported by your card : \");\n\t\tString extensions = glGetString(GL_EXTENSIONS);\n\t\tString[] extArr = extensions.split(\"\\\\ \");\n\t\tfor (int i = 0; i < extArr.length; i++) {\n\t\t\tSystem.out.println(extArr[i]);\n\t\t}\n\t\tSystem.out.println(\"----------------------------\");\n\n\t\twhile (glfwWindowShouldClose(window) == GLFW_FALSE) {\n\t\t\tif (!swapcolor) {\n\t\t\t\tglClearColor(0.0f, 0.0f, 1.0f, 0.0f);\n\t\t\t} else {\n\t\t\t\tglClearColor(0.0f, 1.0f, 0.0f, 0.0f);\n\t\t\t}\n\n\t\t\tglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);\n\t\t\tupdate();\n\t\t\trender();\n\t\t\tglfwSwapBuffers(window);\n\n\t\t\tglfwPollEvents();\n\t\t}\n\t}\n\nThe loop method initialize our main loop and keep it running until we close our application. GL.createCapabilities(); is very important because is a function thats allow the interoperability between the GLFW and the LWJGL system. glGetString is used to get information that OpenGL get from the system when is initialized and here we get some usefull information for our purpose and send it to the console.\n\nwhile (glfwWindowShouldClose(window) == GLFW_FALSE) when the application is not closed we keep doing our stuff. Then we define our clear color that is the color that we use to erase the window and we proceed to clear the window with glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); and the performs the update and the render. At last get the back buffer and send it to the screen with glfwSwapBuffers(window); to finally do glfwPollEvents(); to capture the input events of our application.\n\nThe use of two buffers to make a computer animation is a common technique to avoid the flick of the screen and is wide used in games, you can use more buffers but is more common to have two buffers, is the most used technique.\n7.5 The Run method\nThe method called from the Main java method\n\nRun Method\n    public void run() {\n        System.out.println(\"Hello LWJGL3 \" + Version.getVersion() + \"!\");\n \n        try {\n            init();\n            loop();\n            glfwDestroyWindow(window);\n            keyCallback.release();\n        } finally {\n            glfwTerminate();\n            errorCallback.release();\n        }\n    }\n\nHere we handle the main stages of our application, first init then loop and at last the exit conditions by normal exit or by an error.\n7.6 The Main Method\nThe init method of a classic Java application:\n\nMain Method\n    public static void main(String[] args) {\n        new HelloLWJGL3().run();\n    }\n\n8. The complete source code\nHelloLWJGL.java\npackage example;\n\nimport static org.lwjgl.glfw.GLFW.GLFW_FALSE;\nimport static org.lwjgl.glfw.GLFW.GLFW_KEY_ESCAPE;\nimport static org.lwjgl.glfw.GLFW.GLFW_RELEASE;\nimport static org.lwjgl.glfw.GLFW.GLFW_RESIZABLE;\nimport static org.lwjgl.glfw.GLFW.GLFW_TRUE;\nimport static org.lwjgl.glfw.GLFW.GLFW_VISIBLE;\nimport static org.lwjgl.glfw.GLFW.glfwCreateWindow;\nimport static org.lwjgl.glfw.GLFW.glfwDefaultWindowHints;\nimport static org.lwjgl.glfw.GLFW.glfwDestroyWindow;\nimport static org.lwjgl.glfw.GLFW.glfwGetPrimaryMonitor;\nimport static org.lwjgl.glfw.GLFW.glfwGetVideoMode;\nimport static org.lwjgl.glfw.GLFW.glfwInit;\nimport static org.lwjgl.glfw.GLFW.glfwMakeContextCurrent;\nimport static org.lwjgl.glfw.GLFW.glfwPollEvents;\nimport static org.lwjgl.glfw.GLFW.glfwSetErrorCallback;\nimport static org.lwjgl.glfw.GLFW.glfwSetKeyCallback;\nimport static org.lwjgl.glfw.GLFW.glfwSetWindowPos;\nimport static org.lwjgl.glfw.GLFW.glfwSetWindowShouldClose;\nimport static org.lwjgl.glfw.GLFW.glfwShowWindow;\nimport static org.lwjgl.glfw.GLFW.glfwSwapBuffers;\nimport static org.lwjgl.glfw.GLFW.glfwSwapInterval;\nimport static org.lwjgl.glfw.GLFW.glfwTerminate;\nimport static org.lwjgl.glfw.GLFW.glfwWindowHint;\nimport static org.lwjgl.glfw.GLFW.glfwWindowShouldClose;\nimport static org.lwjgl.opengl.GL11.GL_COLOR_BUFFER_BIT;\nimport static org.lwjgl.opengl.GL11.GL_DEPTH_BUFFER_BIT;\nimport static org.lwjgl.opengl.GL11.GL_EXTENSIONS;\nimport static org.lwjgl.opengl.GL11.GL_MAX_TEXTURE_SIZE;\nimport static org.lwjgl.opengl.GL11.GL_QUADS;\nimport static org.lwjgl.opengl.GL11.GL_RENDERER;\nimport static org.lwjgl.opengl.GL11.GL_VENDOR;\nimport static org.lwjgl.opengl.GL11.GL_VERSION;\nimport static org.lwjgl.opengl.GL11.glBegin;\nimport static org.lwjgl.opengl.GL11.glClear;\nimport static org.lwjgl.opengl.GL11.glClearColor;\nimport static org.lwjgl.opengl.GL11.glColor3f;\nimport static org.lwjgl.opengl.GL11.glEnd;\nimport static org.lwjgl.opengl.GL11.glGetInteger;\nimport static org.lwjgl.opengl.GL11.glGetString;\nimport static org.lwjgl.opengl.GL11.glVertex3f;\nimport static org.lwjgl.system.MemoryUtil.NULL;\n\nimport org.lwjgl.Version;\nimport org.lwjgl.glfw.GLFWErrorCallback;\nimport org.lwjgl.glfw.GLFWKeyCallback;\nimport org.lwjgl.glfw.GLFWVidMode;\nimport org.lwjgl.opengl.GL;\n\npublic class HelloLWJGL {\n\n\tprivate GLFWErrorCallback errorCallback;\n\tprivate GLFWKeyCallback keyCallback;\n\n\tprivate long window;\n\n\tprivate float sp = 0.0f;\n\tprivate boolean swapcolor = false;\n\n\tprivate void init() {\n\t\tglfwSetErrorCallback(errorCallback = GLFWErrorCallback.createPrint(System.err));\n\n\t\tif (glfwInit() != GLFW_TRUE)\n\t\t\tthrow new IllegalStateException(\"Unable to initialize GLFW\");\n\n\t\tglfwDefaultWindowHints();\n\t\tglfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);\n\t\tglfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);\n\n\t\tint WIDTH = 300;\n\t\tint HEIGHT = 300;\n\n\t\twindow = glfwCreateWindow(WIDTH, HEIGHT, \"Hello LWJGL3\", NULL, NULL);\n\t\tif (window == NULL)\n\t\t\tthrow new RuntimeException(\"Failed to create the GLFW window\");\n\n\t\tglfwSetKeyCallback(window, keyCallback = new GLFWKeyCallback() {\n\t\t\t@Override\n\t\t\tpublic void invoke(long window, int key, int scancode, int action, int mods) {\n\t\t\t\tif (key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE)\n\t\t\t\t\tglfwSetWindowShouldClose(window, GLFW_TRUE);\n\t\t\t\t}\n\t\t});\n\n\t\tGLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());\n\t\tglfwSetWindowPos(window, (vidmode.width() - WIDTH) \/ 2, (vidmode.height() - HEIGHT) \/ 2);\n\n\t\tglfwMakeContextCurrent(window);\n\t\tglfwSwapInterval(1);\n\n\t\tglfwShowWindow(window);\n\t}\n\n\tprivate void update() {\n\t\tsp = sp + 0.001f;\n\t\tif (sp > 1.0f) {\n\t\t\tsp = 0.0f;\n\t\t\tswapcolor = !swapcolor;\n\t\t}\n\t}\n\n\tprivate void render() {\n\t\tdrawQuad();\n\t}\n\n\tprivate void drawQuad() {\n\t\tif (!swapcolor) {\n\t\t\tglColor3f(0.0f, 1.0f, 0.0f);\n\t\t} else {\n\t\t\tglColor3f(0.0f, 0.0f, 1.0f);\n\t\t}\n\n\t\tglBegin(GL_QUADS);\n\t\t{\n\n\t\t\tglVertex3f(-sp, -sp, 0.0f);\n\t\t\tglVertex3f(sp, -sp, 0.0f);\n\t\t\tglVertex3f(sp, sp, 0.0f);\n\t\t\tglVertex3f(-sp, sp, 0.0f);\n\t\t}\n\t\tglEnd();\n\n\t}\n\n\tprivate void loop() {\n\t\tGL.createCapabilities();\n\t\tSystem.out.println(\"----------------------------\");\n\t\tSystem.out.println(\"OpenGL Version : \" + glGetString(GL_VERSION));\n\t\tSystem.out.println(\"OpenGL Max Texture Size : \" + glGetInteger(GL_MAX_TEXTURE_SIZE));\n\t\tSystem.out.println(\"OpenGL Vendor : \" + glGetString(GL_VENDOR));\n\t\tSystem.out.println(\"OpenGL Renderer : \" + glGetString(GL_RENDERER));\n\t\tSystem.out.println(\"OpenGL Extensions supported by your card : \");\n\t\tString extensions = glGetString(GL_EXTENSIONS);\n\t\tString[] extArr = extensions.split(\"\\\\ \");\n\t\tfor (int i = 0; i < extArr.length; i++) {\n\t\t\tSystem.out.println(extArr[i]);\n\t\t}\n\t\tSystem.out.println(\"----------------------------\");\n\n\t\twhile (glfwWindowShouldClose(window) == GLFW_FALSE) {\n\t\t\tif (!swapcolor) {\n\t\t\t\tglClearColor(0.0f, 0.0f, 1.0f, 0.0f);\n\t\t\t} else {\n\t\t\t\tglClearColor(0.0f, 1.0f, 0.0f, 0.0f);\n\t\t\t}\n\n\t\t\tglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);\n\t\t\tupdate();\n\t\t\trender();\n\t\t\tglfwSwapBuffers(window);\n\n\t\t\tglfwPollEvents();\n\t\t}\n\t}\n    public void run() {\n        System.out.println(\"Hello LWJGL3 \" + Version.getVersion() + \"!\");\n \n        try {\n            init();\n            loop();\n            glfwDestroyWindow(window);\n            keyCallback.release();\n        } finally {\n            glfwTerminate();\n            errorCallback.release();\n        }\n    }\n\t\n    public static void main(String[] args) {\n        new HelloLWJGL().run();\n    }\n    \n}\n\n\n9. Running the example\nRight click in the project folder and \"Run as\" -> \"Java Application\"\n\n\n10. Results\nExample screens\n\n\n\nthese screens are at varios stages of the animation.\n\nConsole Output\nHello LWJGL3 3.0.0b SNAPSHOT!\n----------------------------\nOpenGL Version : 1.4.0 - Build 8.14.10.1930\nOpenGL Max Texture Size : 2048\nOpenGL Vendor : Intel\nOpenGL Renderer : Intel Bear Lake B\nOpenGL Extensions supported by your card : \nGL_EXT_blend_minmax\nGL_EXT_blend_subtract\nGL_EXT_blend_color\nGL_EXT_abgr\nGL_EXT_texture3D\nGL_EXT_clip_volume_hint\nGL_EXT_compiled_vertex_array\nGL_EXT_cull_vertex\nGL_SGIS_texture_edge_clamp\nGL_SGIS_generate_mipmap\nGL_EXT_draw_range_elements\nGL_SGIS_texture_lod\nGL_EXT_rescale_normal\nGL_EXT_packed_pixels\nGL_EXT_separate_specular_color\nGL_ARB_multitexture\nGL_EXT_texture_env_combine\nGL_EXT_bgra\nGL_EXT_blend_func_separate\nGL_EXT_secondary_color\nGL_EXT_fog_coord\nGL_EXT_texture_env_add\nGL_ARB_texture_cube_map\nGL_ARB_transpose_matrix\nGL_ARB_texture_env_add\nGL_IBM_texture_mirrored_repeat\nGL_EXT_multi_draw_arrays\nGL_NV_blend_square\nGL_ARB_texture_compression\nGL_3DFX_texture_compression_FXT1\nGL_EXT_texture_filter_anisotropic\nGL_ARB_texture_border_clamp\nGL_ARB_point_parameters\nGL_ARB_texture_env_combine\nGL_ARB_texture_env_dot3\nGL_ARB_texture_env_crossbar\nGL_EXT_texture_compression_s3tc\nGL_ARB_shadow\nGL_ARB_window_pos\nGL_EXT_shadow_funcs\nGL_EXT_stencil_wrap\nGL_ARB_vertex_program\nGL_ARB_fragment_program\nGL_EXT_stencil_two_side\nGL_ARB_vertex_buffer_object\nGL_EXT_texture_lod_bias\nGL_NV_texgen_reflection\nGL_ARB_depth_texture\nGL_WIN_swap_hint\n----------------------------\n\nas you can see my computer only supports OpenGL 1.4 also you have the list of all extensions supported in my machine.\n11. Download the source code\nThis was a Tutorial about Lightweight Java Game Library.\n\nDownload\nYou can download the Eclipse project here: LWJGL Tutorial","publisher":{"@id":"#Publisher","@type":"Organization","name":"Examples Java Code Geeks","logo":{"@type":"ImageObject","url":"\/wp-content\/uploads\/2013\/05\/JavaCodeGeeks-logo.png"},"sameAs":["https:\/\/feeds.feedburner.com\/examplesjavacodegeeks","https:\/\/www.facebook.com\/javacodegeeks","https:\/\/twitter.com\/javacodegeeks","https:\/\/www.linkedin.com\/groups\/3810709\/","https:\/\/www.youtube.com\/channel\/UCxoUc7Rar2q90Gu0nT2ffuQ","https:\/\/github.com\/javacodegeeks\/"]},"sourceOrganization":{"@id":"#Publisher"},"copyrightHolder":{"@id":"#Publisher"},"mainEntityOfPage":{"@type":"WebPage","@id":"https:\/\/examples.javacodegeeks.com\/java-development\/core-java\/lwjgl-tutorial\/","breadcrumb":{"@id":"#Breadcrumb"}},"author":{"@type":"Person","name":"Jesus Boadas","url":"https:\/\/examples.javacodegeeks.com\/author\/jesus-boadas\/"},"image":{"@type":"ImageObject","url":"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2012\/12\/java-logo.jpg","width":1200,"height":150}}