Repository navigation
NullPointerException #24
Description
`System.setProperty("java.home", "C:\\Program Files\\Java\\jdk-11.0.1");
StringBuilder sourceCode = new StringBuilder();
sourceCode.append("package me.Perzan.compileString;\n");
sourceCode.append("class HelloClass {\n");
sourceCode.append(" public static void hello() { System.out.println(\"hello\"); }");
sourceCode.append("}");
InMemoryJavaCompiler compiler = InMemoryJavaCompiler.newInstance();
compiler.addSource("HelloClass", sourceCode.toString());
Map<String, Class<?>> classMap = compiler.compileAll();
Class<?> helloClass = classMap.get("HelloClass");
Method m = helloClass.getMethod("hello");
m.invoke(null);`
So at the line with 'Map<String, Class<?>> classMap = compiler.compileAll();' I get NullPointerException. I even set the property for JDK at the beginning. I'm not sure why this is happening, for my version is pretty much the same as your example...
(Also the '`' things are not part of it, I was just trying to insert the code)
Also here is the stack trace:
Exception in thread "main" java.lang.NullPointerException at org.mdkt.compiler.InMemoryJavaCompiler.compileAll(InMemoryJavaCompiler.java:80) at me.Perzan.compileString.CompileTest.main(CompileTest.java:26)
Activity
fgMAI commentedon Feb 9, 2019
I can confirm nullpointer exceptions. Only one time it worked, but i cannot Recall the difference from code.
fgMAI commentedon Feb 10, 2019
For me the Problem is that i generate unique filenames for the .java File,from input Code. With fixed names it does work.
Check the names calling.. do it like example, object names are not arbitrary - it has to match!
calebneuf commentedon May 22, 2021
getting this issue