一 . suspend()与resume()方法的使用

        创建MyThread类

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++;                }            }        }

        创建调用类:

public class Test {            public static void main(String[] args) {                try {                    MyThread myThread = new MyThread();                    myThread.start();                    Thread.sleep(2000);                    myThread.suspend();                    System.out.println(" the value of i = " + myThread.getI() + "and the time is : " + System.currentTimeMillis());                    Thread.sleep(5000);                    System.out.println(" the value of i = " + myThread.getI() + "and the time is : " + System.currentTimeMillis());                    myThread.resume();                    Thread.sleep(5000);                    myThread.suspend();                    System.out.println(" the value of i = " + myThread.getI() + "and the time is : " + System.currentTimeMillis());                    Thread.sleep(5000);                    System.out.println(" the value of i = " + myThread.getI() + "and the time is : " + System.currentTimeMillis());                } catch (Exception e) {                    e.printStackTrace();                }            }}

        运行结果:

二 .   suspend()与resume()的缺点

        1 . 独占

             在使用suspend()与resume()方法时,如果使用不当,极易造成公共的同步对象的独占,使得其他线程无法访问公共同步对象

        2 . suspend()与resume()的缺点 --- 不同步