Java sum传递如何完成成员变量
Java sum传递需要我们不断的学习,当然我们在学习中会有很多的问题需要我们解决。下面我们就详细的来看看不能更好的启动100个线程。每个线程给变量Java sum传递加1(sum初始值为0)。需要通过引用传递,将sum传递给线程。
为了能够进行引用传递,将sum作为一个类成员变量,并将该类的对象传递给线程。使用加锁和不加锁两种方式实现加1操作,看看最终的执行效果。
1.*/
2.public class Thread100Baidu {
3.public static void main(String[] args) {
4.int[] sum = new int[100];
5.MyThread[] mt = new MyThread[100];
6.for(int i=0;i<sum.length;i++) {
7.sum[i] = i;
8.mt[i] = new MyThread(sum[i]);
9.mt[i].start();
10.}
11.}
12.}
13.class MyThread extends Thread {
14.int sum = 0;
15.public MyThread(int sum) {
16.this.sum = sum;
17.}
18.public synchronized void run() {
19.while(sum<100) {
20.System.out.println(currentThread().getName() + " sum= " + sum);
21.sum++;
22.}
23.}
24.}
25./*
Java sum传递编写3个线程,一个线程给某个对象里的整型变量赋初值,第二个线程给初值加10,第三个线程给变量值清0,要求这3个线程严格按照赋初值、加10、清0顺序执行,使用多线程的共享与同步的方式实现。
26.public class ThreeThreadBaidu {
27.public static void main(String[] args) {
28.Myobject mo = new Myobject(0);
29.FirstThread ft = new FirstThread(mo);
30.ft.start();
31.SecondThread st = new SecondThread(mo);
32.st.start();
33.ThirdThread tt = new ThirdThread(mo);
34.tt.start();
35.}
36.}
37.class Myobject {
38.int i;
39.public Myobject(int i) {
40.this.i = i;
41.}
42.}
43.class FirstThread extends Thread {
44.Myobject mo = null;
45.public FirstThread(Myobject mo) {
46.this.mo = mo;
47.}
48.public synchronized void run() {
49.mo.i = 100;
50.System.out.println(currentThread().getName()+ " 初始值 = " + mo.i);
51.}
52.}
53.class SecondThread extends Thread {
54.Myobject mo = null;
55.public SecondThread(Myobject mo) {
56.this.mo = mo;
57.}
58.public synchronized void run() {
59.mo.i += 10 ;
60.System.out.println(currentThread().getName()+ " 加10后 = " + mo.i);
61.}
62.}
63.class ThirdThread extends Thread {
64.Myobject mo = null;
65.public ThirdThread(Myobject mo) {
66.this.mo = mo;
67.}
68.public synchronized void run() {
69.mo.i = 0 ;
70.System.out.println(currentThread().getName()+ " 清0后 = " + mo.i);
71.}
72.}
以上就是对Java sum传递的详细介绍。
- 51.la

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