JAVA多线程之线程的挂起与恢复（suspend方法与resume方法）

public class MyThread extends Thread {

    private long i = 0;

    public long getI() {
        return i;
    }

    public void setI(long i) {
        this.i = i;
    }

    @Override
    public void run() {
        while (true) {
            i++;
            System.out.println(i);//同步方法
        }
    }

}            

 1 public class Run {
 2 
 3     public static void main(String[] args) {
 4 
 5         try {
 6             MyThread thread = new MyThread();
 7             thread.start();//启动一个线程‘thread‘
 8             Thread.sleep(1000);//使当前线程(main线程)睡眠
 9             thread.suspend();//挂起线程‘thread‘
10             System.out.println("main end!");
11         } catch (InterruptedException e) {
12             e.printStackTrace();
13         }
14     }
15 
16 }

 1  /**
 2      * Prints an Object and then terminate the line.  This method calls
 3      * at first String.valueOf(x) to get the printed object‘s string value,
 4      * then behaves as
 5      * though it invokes <code>{@link #print(String)}</code> and then
 6      * <code>{@link #println()}</code>.
 7      *
 8      * @param x  The <code>Object</code> to be printed.
 9      */
10     public void println(Object x) {
11         String s = String.valueOf(x);
12         synchronized (this) {
13             print(s);
14             newLine();
15         }
16     }

 /**
     * The "standard" output stream. This stream is already
     * open and ready to accept output data. Typically this stream
     * corresponds to display output or another output destination
     * specified by the host environment or user.
     * <p>
     * For simple stand-alone Java applications, a typical way to write
     * a line of output data is:
     * <blockquote><pre>
     *     System.out.println(data)
     * </pre></blockquote>
     * <p>
     * See the <code>println</code> methods in class <code>PrintStream</code>.
     */
    public final static PrintStream out = null;