How to disable System.out?¶

package org.halyph;  

import java.io.OutputStream;  
import java.io.PrintStream;  

public class DisableMain {  
    public static void main(String\[\] args) {  
        PrintStream printStreamOriginal = System.out;  

        boolean DEBUG = true;  
        if (!DEBUG) {  
            System.setOut(new PrintStream(new OutputStream() {  
                public void close() {}  
                public void flush() {}  
                public void write(byte[] b) {}  
                public void write(byte[] b, int off, int len) {}  
                public void write(int b) {  
                }  
            }));  
        }  

        long a = System.currentTimeMillis();  
        for (int i = 0; i < 1000000; i++) {  
            System.out.println("Hello");  
        }  

        long b = System.currentTimeMillis() - a;  

        System.setOut(printStreamOriginal);  
        System.out.println(b);  
    }  
}