So I trying out lwjgl but I’m having a problem, when I try to create a window I get an error I just can’t figure out why.
I have tried to lower my java version from java 16 to 14 but that didn’t work.
Main Class:
package ca.immanuel.flappy;
import org.lwjgl.glfw.GLFWVidMode;
import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.opengl.GL11.GL_TRUE;
import static org.lwjgl.system.MemoryUtil.NULL;
public class Main implements Runnable {
private int width = 1280;
private int height = 720;
private Thread thread;
private boolean running = false;
/*
LWJGL cant use the GLFWwindow struct because structs don't exist in java
so we instead use an ID system in Java that's why we use a long.
*/
private long window;
public void start() {
running = true;
thread = new Thread(this, "Game");
thread.start();
}
private void init() {
if (!glfwInit()){
System.out.println("GLFW failed to init!");
System.exit(-1);
}
glfwWindowHint(GLFW_RESIZABLE, GL_TRUE);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwCreateWindow(width, height, "Flappy Bird", NULL, NULL);
if (window == NULL) {
System.out.println("Could not create window");
System.exit(-1);
}
GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
glfwSetWindowPos(window, (vidmode.width() - width) /2, (vidmode.height() - height) /2);
glfwMakeContextCurrent(window);
glfwShowWindow(window);
}
public void run() {
init();
while(running) {
update();
render();
if (glfwWindowShouldClose(window) == true){
running = false;
}
}
}
private void update() {
glfwPollEvents();
}
private void render() {
glfwSwapBuffers(window);
}
public static void main(String[] args) {
new Main().start();
}
}
when I run my main class I get this error (on java jdk 16):
Task :Main.main() FAILED Could not create window
Execution failed for task ‘:Main.main()’.
Process ‘command ‘C:/Program Files/Java/jdk-16/bin/java.exe” finished with non-zero exit value -1
- Try: Run with –stacktrace option to get the stack trace. Run with –info or –debug option to get more log output. Run with –scan to get full insights.
I tried running it with info and this is my output:
Task :Main.main() FAILED Caching disabled for task ‘:Main.main()’ because: Build cache is disabled Task ‘:Main.main()’ is not up-to-date because: Task has not declared any outputs despite executing actions. Starting process ‘command ‘C:/Program Files/Java/jdk-16/bin/java.exe”. Working directory: C:UsersimmanDocumentsFlappyBird Command: C:/Program Files/Java/jdk-16/bin/java.exe -Dfile.encoding=windows-1252 -Duser.country=CA -Duser.language=en -Duser.variant -cp C:UsersimmanDocumentsFlappyBirdbuildclassesjavamain;C:UsersimmanDocumentsFlappyBirdbuildclassesgroovymain;C:UsersimmanDocumentsFlappyBirdbuildresourcesmain;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-bgfx3.2.3433883c4040fa8df47244dffa1d42c96ce2143delwjgl-bgfx-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-bgfx3.2.3f589da97dd3cfa96f42c8c812a0a028cf28223b8lwjgl-bgfx-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-glfw3.2.35e520d5c290c8b012545a8d34fa5db5ab051ea53lwjgl-glfw-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-glfw3.2.3b4d8a3477cdc2edcf7a5f1e822926be846223f54lwjgl-glfw-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-nanovg3.2.3718be4a13691d1cd276fa852326e9e837d65204elwjgl-nanovg-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-nanovg3.2.32fbe5c2849bcf182ba3c6c09828f032a64cd47eclwjgl-nanovg-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-nuklear3.2.345bfab23e975201bf3cb81287be6034adec64a86lwjgl-nuklear-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-nuklear3.2.3ccb63f09670e43e58969b567ef42e02275be555alwjgl-nuklear-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-openal3.2.3106742e805803ab9eab8e343f0fb31a3d263903clwjgl-openal-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-openal3.2.3ec898e8ce11b5886f4f532a1536283ef2817758dlwjgl-openal-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-opengl3.2.3bdd534a323d0c8f54969b95e424b6ac8984f7d6elwjgl-opengl-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-opengl3.2.3e81cfc73ec8708e5e791ed770e4ec3edfc1bbab1lwjgl-opengl-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-par3.2.392d96fe3a3345f4c18ca0e682de41b20ec64b70clwjgl-par-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-par3.2.3b60677b2948f930736aa2bff952fe8380bfe9fbelwjgl-par-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-stb3.2.340eccaa4fa86fc815f2e17946a392fb5fdcc286alwjgl-stb-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl-stb3.2.3817b21ec286f0ba3dcedb56a3bd275e6a9345be9lwjgl-stb-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl3.2.317a59ba0fe8d474ec9dbe0d5db40d2cfe59c4c08lwjgl-3.2.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.lwjgllwjgl3.2.327f32cd35349684745951e04388e8e00d681cdcdlwjgl-3.2.3-natives-windows.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-ant3.0.5c41c989d5138e9ac48efb1d77e7f271699d10f17groovy-ant-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-astbuilder3.0.5ab712931e02cb8876d9e39567283a43583ddef20groovy-astbuilder-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-cli-picocli3.0.5fe73f204778dcb438bb810ec78fd3fc1fe8e5709groovy-cli-picocli-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-groovysh3.0.580b27062568c6b2efb9dd1a2803c0d22bed182eagroovy-groovysh-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-console3.0.5d0e7aec0100a12600e3e1bb33d9140eff52753fcgroovy-console-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-datetime3.0.5c47535a64ceab4d93227169cb97acab15dfa575agroovy-datetime-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-groovydoc3.0.5ce4ce5eedd7d18c14433989d777504150f761472groovy-groovydoc-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-docgenerator3.0.57f7ba0ef7a1b9fd0f5fd5550ee31bdb09d565505groovy-docgenerator-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-jmx3.0.55bae59fafaea99a031be9ea4d1af76e4347d62eagroovy-jmx-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-json3.0.53c71dad1aaa890d0012fc72640c1b54263a0de1bgroovy-json-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-jsr2233.0.5cd226c46e662e916d669b6be9467d3b8c591e5dgroovy-jsr223-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-macro3.0.5106cd0b1654415b6fe24c23dfa0c4de5be9d6ed0groovy-macro-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-nio3.0.5225826095f801716e67b1607bb5ad94deb8e4cc9groovy-nio-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-servlet3.0.5ad3615cd34cd71e8287934140d5e1e4509cbca82groovy-servlet-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-sql3.0.5c1b21c52f4289083176e11cdeba8c54b3354945egroovy-sql-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-swing3.0.557e204d3ab7dd307cee9cd80d0fe607e0c43a6c5groovy-swing-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-templates3.0.5df1b1d2f06b7950c7d356983f6edaa99e6fff892groovy-templates-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-test3.0.58a6c5a4a67cbadd2e596296e738dfbb8509e9024groovy-test-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-test-junit53.0.5b04895ecd3902448db8da483f087d7ec93894c3egroovy-test-junit5-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-testng3.0.5a48a9b291fd571adc8a2161a6781ddc121daa48cgroovy-testng-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy-xml3.0.5e2d01a89405dbb5c3a24d0b7db890cefb8d57b2bgroovy-xml-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.codehaus.groovygroovy3.0.5545f7c5e0e30e5cf2d24f4efe661e4bfded2dfa2groovy-3.0.5.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.apache.antant-junit1.10.8f75d2cbe7f63db600fc34e23aa447c27095056cfant-junit-1.10.8.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.apache.antant1.10.8ae148abb0532b685c5eeb22fdec9d124e89be5deant-1.10.8.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.apache.antant-launcher1.10.82ca8688d2dad5694237576db782b37279989614dant-launcher-1.10.8.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.apache.antant-antlr1.10.83d728985e3b6a71b80d10db0d574a60b496590a1ant-antlr-1.10.8.jar;C:Usersimman.gradlecachesmodules-2files-2.1info.picoclipicocli4.4.0c3e3741e126f70c10bfff50953c42827a57901c1picocli-4.4.0.jar;C:Usersimman.gradlecachesmodules-2files-2.1com.thoughtworks.qdoxqdox1.12.1f7122f6ab1f64bdf9f5970b0e89bfb355e036897qdox-1.12.1.jar;C:Usersimman.gradlecachesmodules-2files-2.1com.github.javaparserjavaparser-core3.16.1440e5d7118e50d544418a96873d6322c4b1d5527javaparser-core-3.16.1.jar;C:Usersimman.gradlecachesmodules-2files-2.1jlinejline2.14.6c3aeac59c022bdc497c8c48ed86fa50450e4896ajline-2.14.6.jar;C:Usersimman.gradlecachesmodules-2files-2.1junitjunit4.13e49ccba652b735c93bd6e6f59760d8254cf597ddjunit-4.13.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.junit.platformjunit-platform-launcher1.6.2d866de2950859ca1c7996351d7b3d97428083cd0junit-platform-launcher-1.6.2.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.junit.platformjunit-platform-engine1.6.21752cad2579e20c2b224602fe846fc660fb35805junit-platform-engine-1.6.2.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.junit.platformjunit-platform-commons1.6.27644a14b329e76b5fe487628b50fb5eab6ba7d26junit-platform-commons-1.6.2.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.junit.jupiterjunit-jupiter-engine5.6.2c0833bd6de29dd77f8d071025b97b8b434308cd3junit-jupiter-engine-5.6.2.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.junit.jupiterjunit-jupiter-api5.6.2c9ba885abfe975cda123bf6f8f0a69a1b46956d0junit-jupiter-api-5.6.2.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.testngtestng7.1.0b0bcea778fb2899aeb4014c558babea8833d180atestng-7.1.0.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.hamcresthamcrest-core1.342a25dc3219429f0e5d060061f71acb49bf010a0hamcrest-core-1.3.jar;C:Usersimman.gradlecachesmodules-2files-2.1org.opentest4jopentest4j1.2.028c11eb91f9b6d8e200631d46e20a7f407f2a046opentest4j-1.2.0.jar;C:Usersimman.gradlecachesmodules-2files-2.1com.beustjcommander1.726375e521c1e11d6563d4f25a07ce124ccf8cd171jcommander-1.72.jar;C:Usersimman.gradlecachesmodules-2files-2.1com.google.injectguice4.1.0faf9ee8ac09eafd1128091426dd367a8c0085d55guice-4.1.0-no_aop.jar;C:Usersimman.gradlecachesmodules-2files-2.1javax.injectjavax.inject16975da39a7040257bd51d21a231b76c915872d38javax.inject-1.jar;C:Usersimman.gradlecachesmodules-2files-2.1aopallianceaopalliance1.0235ba8b489512805ac13a8f9ea77a1ca5ebe3e8aopalliance-1.0.jar;C:Usersimman.gradlecachesmodules-2files-2.1com.google.guavaguava19.06ce200f6b23222af3d8abb6b6459e6c44f4bb0e9guava-19.0.jar ca.immanuel.flappy.Main Successfully started process ‘command ‘C:/Program Files/Java/jdk-16/bin/java.exe” Could not create window :Main.main() (Thread[Execution worker for ‘:’,5,main]) completed. Took 0.784 secs.
Execution failed for task ‘:Main.main()’.
Process ‘command ‘C:/Program Files/Java/jdk-16/bin/java.exe” finished with non-zero exit value -1
- Try: Run with –stacktrace option to get the stack trace. Run with –debug option to get more log output. Run with –scan to get full insights.
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Answer
Ok so the problem was very simple I never changed the windows value
before the long window was set to nothing
but I figured out that I had to set it equal to glfwCreateWindow:
before:
glfwCreateWindow(width, height, "Flappy Bird", NULL, NULL);
after:
window = glfwCreateWindow(width, height, "Flappy Bird", NULL, NULL);