public class Test116 {
static final StringBuffer sb1 = new StringBuffer();
static final StringBuffer sb2 = new StringBuffer();
public static void main(String[] args) {
new Thread(){
public void run(){
synchronized (sb1) {
sb1.append("A"); sb2.append("B");
}
}
}.start();
new Thread(){
public void run(){
synchronized (sb1) {
sb1.append("C"); sb2.append("D");
}
}
}.start();
System.out.println(sb1+" "+sb2);
}
}
