Convert .java to .class within a java program

Question

I have several .java files created during runtime. I want to use those created .java files as classes in my program. How may I do this, without starting the program a second time ? So I want to compile the .java files during runtime and use the new .class files from now on...

Search for Java Compiler API. – Rohit Jain Aug 07 '13 at 13:31 — Rohit Jain, Aug 07 '13 at 13:31

score 1 · Answer 1 · answered Aug 07 '13 at 13:30

Use the Java Compiler API:

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, null, fileToCompile);
            if(compilationResult == 0){
               System.out.println("Compilation is successful");
           }else{
               System.out.println("Compilation Failed");
           }
    }
}

Detailed Example with explanation

score 0 · Answer 2 · answered Aug 07 '13 at 13:30

0

You can use the Compiler API included in the JDK. See here.

answered Aug 07 '13 at 13:30

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Convert .java to .class within a java program

2 Answers2