利用线程的知识，完成一个线程负责打印1-26的数字，另一个线程负责打印A-Z

public class MyTestThread1 {

/**
* 利用线程的知识，完成一个线程负责打印1-26的数字，另一个线程负责打印A-Z
* @author user
*
*/

public static void main(String[] args) {
Object obj = new Object();
Thread1 t1 = new Thread1(obj);
t1.start();
Thread2 t2 = new Thread2(obj);
Thread thread = new Thread(t2);
thread.start();
}

}

class Thread1 extends Thread{
private Object obj;

public Thread1(Object obj) {
this.obj = obj;
}

@Override
public void run() {
synchronized (obj) {
for(int i = 1;i <= 26;i++){
System.out.print(2*i - 1+" ");
System.out.print(2*i+" ");
obj.notifyAll();
try {
obj.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
class Thread2 implements Runnable{
private Object obj;

public Thread2(Object obj) {
this.obj = obj;
}

public void run() {
synchronized (obj) {

for (char c = 'A'; c <= 'Z'; c++) {
System.out.print(c+" ");
obj.notifyAll();
try {
obj.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
}
}

}