MyClass.
java:
package test; public class MyClass { public void myMethod(){ System.out.println("My Method Called"); } }
列出用于编译MyClass.java文件的SimpleCompileTest.java.
SimpleCompileTest.java:
package test; import javax.tools.*; public class SimpleCompileTest { public static void main(String[] args) { String fileToCompile = "test" + java.io.File.separator +"MyClass.java"; JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); int compilationResult = compiler.run(null,null,fileToCompile); if(compilationResult == 0){ System.out.println("Compilation is successful"); }else{ System.out.println("Compilation Failed"); } } }
我正在执行SimpleCompileTest类并获得NullPointerException. ToolProvider.getSystemJavaCompiler()返回null.有人可以告诉我代码有什么问题吗?