用三个线程按顺序循环打印 abc 三个字母，比如 abcabcabc。

public static void main(String[] args) {
final String str=“abc”;
ExecutorService executorService= Executors.newFixedThreadPool(3);
executorService.execute(new Runnable() {
@Override
public void run() {
System.out.println(“1”+str);
}
});executorService.execute(new Runnable() {
@Override
public void run() {
System.out.println(“2”+str);
}
});executorService.execute(new Runnable() {
@Override
public void run() {
System.out.println(“2”+str);
}
});
}