ThreadInfo.java

package org.javacore.thread;


import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * 描述:线程优先级案例
 * Created by bysocket on 16/2/24.
 */
public class ThreadInfo {
    public static void main(String[] args) {
        Thread threads[] = new Thread[10];
        Thread.State status[] = new Thread.State[10];
        for (int i = 0; i < 10; i++) {
            threads[i] = new Thread(new Calculator(i));
            if ((i % 2) == 0) {
                threads[i].setPriority(Thread.MAX_PRIORITY);
            } else {
                threads[i].setPriority(Thread.MIN_PRIORITY);
            }
//            threads[i].setName("");
        }

        try {
            // 将线程的信息写入log文件
            FileWriter fw = new FileWriter(".\\log.txt");
            PrintWriter pw = new PrintWriter(fw);

            for (int i = 0; i <10 ;i++) {
                pw.println("Main: Status of Thread " + i + " : "
                        + threads[i].getState());
                status[i] = threads[i].getState();
            }

            // 启动线程
            for (int i = 0; i < 10 ;i++)
                threads[i].start();

            boolean finish = false;
            while (!finish) {
                for(int i = 0;i < 10 ;i++) {
                    if (threads[i].getState() != status[i]) {
                        writeThreadInfo(pw,threads[i],status[i]);
                        status[i] = threads[i].getState();
                    }
                }
                finish = true;
                for (int i = 0;i < 10 ;i++) {
                    finish = finish && (threads[i].getState() == Thread.State.TERMINATED);//中断
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void writeThreadInfo(PrintWriter pw, Thread thread, Thread.State status) {
        pw.printf("Main: Id %d - $s\n",thread.getId(),thread.getName());
        pw.printf("Main: Priority: %d\n",thread.getPriority());
        pw.printf("Main: OldState: %s\n",status);
        pw.printf("Main: New State: %s\n",thread.getState());
        pw.printf("*****************************************\n");
    }
}
class Calculator implements Runnable {

    private int number;

    public Calculator(int number) {
        this.number = number;
    }

    @Override
    public void run() {
        for (int i = 0;i <=10; i++) {
            System.out.printf("%s: %d * %d = %d\n",
                    Thread.currentThread().getName(),
                    number, i, i * number);
        }
    }
}