Java 基于Runnable接口的线程实例

末蓝、 2023-07-26 05:39 21阅读 0赞

***[点此查看全部文字教程、视频教程、源代码][Link 1]***

### 本文目录 ###

*  1. 功能
 *  2. 代码
 *  3. 测试
 *  4. 结果

# 1. 功能 #

通过实现Runnable接口，开发线程，然后读取文件大小。

# 2. 代码 #

读取文件大小：

package org.maoge.thread;
    
    import java.io.File;
    
    /**
     * 读取文件大小
     */
    public class ReadFileRunnable implements Runnable {
        
    
    	private String fileName;
    
    	public ReadFileRunnable(String fileName) {
        
    		this.fileName = fileName;
    	}
    
    	@Override
    	public void run() {
        
    		File f = new File(fileName);
    		if (f.exists() && f.isFile()) {
        
    			System.out.println("[" + fileName + "] length:" + f.length());
    		} else {
        
    			System.out.println("[" + fileName + "] not exists");
    		}
    	}
    }

# 3. 测试 #

编写测试类：

package org.maoge.thread;
    
    /**
     * 读文件测试
     */
    public class ReadFileTest {
        
    	public static void main(String[] args) {
        
    		for (int i = 0; i < 10; i++) {
        
    			ReadFileRunnable writeFile = new ReadFileRunnable("D:\\temp\\" + (i + 500) + ".txt");
    			Thread thread = new Thread(writeFile);
    			thread.start();
    		}
    	}
    }

# 4. 结果 #

因为我们之前通过[Java 继承Thread实现线程][Java _Thread]写了10个文件，所以此处直接输出结果：

[D:\temp\500.txt] length:1000000
    [D:\temp\501.txt] length:1000000
    [D:\temp\504.txt] length:1000000
    [D:\temp\508.txt] length:1000000
    [D:\temp\503.txt] length:1000000
    [D:\temp\505.txt] length:1000000
    [D:\temp\506.txt] length:1000000
    [D:\temp\509.txt] length:1000000
    [D:\temp\502.txt] length:1000000
    [D:\temp\507.txt] length:1000000

[Link 1]: https://studyingpanda.blog.csdn.net/article/details/105329926
[Java _Thread]: https://blog.csdn.net/woshisangsang/article/details/77222166