Java Code之线程(二)

Java提供了Thread类来创建线程，具体看代码

新建下载线程类

package com.iteye.badpie.javacode.thread;

import java.util.Random;

public class DownloadThread
extends Thread {

private static 
final String TAG = DownloadThread.class.getSimpleName();
private String mMovie;
private Random mRandom;

public DownloadThread(Random random, String movie) {
mRandom = random;
mMovie = movie;
}

@Override
public void run() {
log(TAG, "电影 " + mMovie + " 开始下载");
for (int i = 
0; i < 100;) {
// 模拟网络下载，随机耗时
synchronized (this) {
try {
int time = mRandom.nextInt(5000);
wait(time);
i += 20;
} catch (InterruptedException e) {
e.printStackTrace();
}
}

log(TAG, "电影 " + mMovie + " 下载进度... " + i +
"%");
}
log(TAG, "电影 " + mMovie + " 下载结束");
}

private void log(String TAG, Object message) {
System.out.println(String.format("%s : %s", TAG, message));
}

}

package com.iteye.badpie.javacode.thread;

import java.util.Random;

public class DownloadThread extends Thread {

    private static final String TAG = DownloadThread.class.getSimpleName();
    private String mMovie;
    private Random mRandom;

    public DownloadThread(Random random, String movie) {
        mRandom = random;
        mMovie = movie;
    }

    @Override
    public void run() {
        log(TAG, "电影 " + mMovie + " 开始下载");
        for (int i = 0; i < 100;) {
            // 模拟网络下载，随机耗时
            synchronized (this) {
                try {
                    int time = mRandom.nextInt(5000);
                    wait(time);
                    i += 20;
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            log(TAG, "电影 " + mMovie + " 下载进度... " + i + "%");
        }
        log(TAG, "电影 " + mMovie + " 下载结束");
    }

    private void log(String TAG, Object message) {
        System.out.println(String.format("%s : %s", TAG, message));
    }

}

这样启动线程