Question

java编写两个线程，要求一个输出打印1-52，一个输出打印a-z。打印顺序要12a34b56c......51 52 z

希望大家给力..............
那个改过答案的大侠，你自己试过代码吗/
我运行不行啊..............

Answer 1

两个线程一个线程打印数字，一个线程用来打印字母，这样的话打印出来的顺序是数字和字母夹杂在一起的，而不是楼主所指的12a34b56c......51 52 z

Answer 2

package semihum.threadTest;

public class Thread1 implements Runnable {
private Object _lock;

public Thread1(Object lock) {
_lock = lock;
}

@Override
public void run() {
try {
synchronized (_lock) {
for (int i = 0; i < 26; i++) {
//System.out.print((char) ('a' + i));
System.out.print((2 * i + 1) + "" + (2 * i + 2));
_lock.notify();
_lock.wait();
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}

}

package semihum.threadTest;

public class Thread2 implements Runnable {
private Object _lock;

public Thread2(Object lock) {
_lock = lock;
}

@Override
public void run() {
synchronized (_lock) {
for (int i = 0; i < 26; i++) {
try {
_lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
//System.out.print((2 * i + 1) + "" + (2 * i + 2));
System.out.print((char) ('a' + i));
_lock.notify();
}
}
}

}

package semihum.threadTest;

public class Main {
public static void main(String[] args){
Object lock=new Object();
Thread t1=new Thread(new Thread1(lock));
Thread t2=new Thread(new Thread2(lock));
t1.start();
t2.start();
try {
t1.join();
t2.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
//现制,貌似写成a12b34c56...了...您就看着随便改改吧...JDK 1.6
好吧,我改过了,我只想说,LZ你要只是应付作业什么的吧...

Answer 3

我编写了两个类文件，线程ThreadNum用来输出数字，线程ThreadChar用来输出字母，线程都在 testthread包下。
本来我用的方法是Thread.sleep（10），后来想这样只是使当前输出线程停顿了10毫秒，不能很好的体现线程的抢占机制，而且还要处理抛出来的异常，于是我又换成Thread.yield();这样就好多了，有人抢到，当前线程就等着，没人抢到，它就继续执行，于是就能出来两个输出是不确定的交叉输出的效果。
下面是线程ThreadNum；
package testthread;
public class ThreadNum {
public static void main(String[] args){
ThreadChar threadChar = new ThreadChar();
threadChar.start();
for (int i = 1; i <= 52; i++) {
System.out.print(i + " ");
Thread.yield();
}
}
}
下面是线程ThreadChar；
package testthread;

public class ThreadChar extends Thread {
public void run() {
for (int i = 97; i <= 122; i++) {
char c = (char) i;
System.out.print(c + " ");
Thread.yield();
}
}
}

如果嫌上面的代码复杂，简单点就可以写成内部类，下面是代码，存成ThreadNum 文件就可以了：
public class ThreadNum {
public static void main(String[] args){
ThreadChar threadChar = new ThreadChar();
threadChar.start();
for (int i = 1; i <= 52; i++) {
System.out.print(i + " ");
Thread.yield();
}
}
}
class ThreadChar extends Thread {
public void run() {
for (int i = 97; i <= 122; i++) {
char c = (char) i;
System.out.print(c + " ");
Thread.yield();
}
}
}