Java sum傳遞需要我們不斷的學習,當然我們在學習中會有很多的問題需要我們解決.下面我們就詳細的來看看不能更好的啟動100個線程.每個線程給變數Java sum傳遞加1(sum初始值為0).需要通過引用傳遞,將sum傳遞給線程.
為了能夠進行引用傳遞,將sum作為一個類成員變數,並將該類的對象傳遞給線程.使用加鎖和不加鎖兩種方式實現加1操作,看看最終的執行效果.
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
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傳遞編寫3個線程,一個線程給某個對象里的整型變數賦初值,第二個線程給初值加10,第三個線程給變數值清0,要求這3個線程嚴格按照賦初值、加10、清0順序執行,使用多線程的共享與同步的方式實現.
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.}
以上就是對Java sum傳遞的詳細介紹.
