Compiling a Java class using JavaCompiler - II

19 April 2008

You may want to compile more than one classes from a Java class using javax.tools package. This is shown in this post.

I will use the same code as given in first part of this post. Only difference is that I will use a File array and will put the file objects referring to Java classes.

import javax.tools.*;
import java.io.*;
import java.util.Arrays;
 
public class Main {
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        System.out.println("Hello World");
 
        File file1 = new File("C:\\ClassA.java");
        File file2= new File("C:\\ClassB.java");
        File []fileArray;
        fileArray = new File[2];
 
        fileArray[0]= file1;
        fileArray[1]= file2;  
 
       // File files1 = file ; // input for first compilation task
       JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
       StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);
 
       Iterable<? extends JavaFileObject> compilationUnits1 =
           fileManager.getJavaFileObjectsFromFiles(Arrays.asList(fileArray));
       compiler.getTask(null, fileManager, null, null, null, compilationUnits1).call();
    }
 
}