search

google / elemental2

Type checked access to browser APIs for Java code.
Apache License 2.0
150 stars 37 forks source link

java.lang.UnsatisfiedLinkError #155

Open haaohao opened 2 years ago

haaohao commented 2 years ago

Hi all, Recently, i am using the elemental2-core for using js type of Int8Array, but got exception. if anyone can tell what i am wrong. thanks.

jdk is 1.8 and 1.11

dependency is using :

com.google.elemental2 elemental2-core 1.1.0

java code is as below: ArrayBuffer buffer = new ArrayBuffer(8); Int8Array array = new Int8Array(buffer); DataView view = new DataView(buffer); view.setInt8(0, v);

but got below error: java.lang.UnsatisfiedLinkError: elemental2.core.DataView.setInt8(ID)V at elemental2.core.DataView.setInt8(Native Method) at game.creata.engine.worker.script.shell.VoxelViewTest.writeDouble(VoxelViewTest.java:24) at game.creata.engine.worker.script.shell.VoxelViewTest.testName(VoxelViewTest.java:17) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at junit.framework.TestCase.runTest(TestCase.java:177) at junit.framework.TestCase.runBare(TestCase.java:142) at junit.framework.TestResult$1.protect(TestResult.java:122) at junit.framework.TestResult.runProtected(TestResult.java:142) at junit.framework.TestResult.run(TestResult.java:125) at junit.framework.TestCase.run(TestCase.java:130) at junit.framework.TestSuite.runTest(TestSuite.java:241) at junit.framework.TestSuite.run(TestSuite.java:236) at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:90) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArg

niloc132 commented 2 years ago

It looks you are trying to run this from inside the JVM, instead of as JS, and that isn't going to work - these "native" methods are implemented by the browser, so the code must be executed in a browser. Specifically, these are meant to be used by GWT or J2CL, as opposed to other tools like JSweet or TeaVM which also enable you to transpile Java so that it can be run in as JavaScript.

If you happen to be using something like LibGDX to develop a game (which in turn uses GWT to create its HTML builds), you'll need to be sure to only use this class from your HTML code, not from your other platforms.

haaohao commented 2 years ago

Hi niloc132,

Ok, noted. Know what I am wrong now, and i need to try other way to do that.

So Appreciate for your help