SWT 学习(f��n)�W�记3 SWT 与多�U�程

Wed, 13 Sep 2006 01:13:00 GMT

2006-9-12

前天�?/span> SWT 的多�U�程�l�于搞定�Q�本来想写点心得�Q�苦于没旉��Q�今天刚好有旉��Q�就写了如下拙作�Q?/span> ^_^ �?/span>

1 �Q�先看看 JAVA JDK 里的多线�E�：(x��)

JDK 里的多项�E�里有两�U�方式：(x��) extends Thread �?/span> implements Runnable �Q�当调用�U�程�cȝ�� start() �Ҏ(gu��)��Q�本质是调用 run() �Q�线�E�执行�?/span>

e.g.

package com.javathread;

public class TestThread {

/**

* @param args

public static void main(String[] args) {

// TODO Auto-generated method stub

Thread t1 = new NewThread();// Create two new Thread

t1.setName("t1");

Thread t2 = new NewThread();

t2.setName("t2");

// new NewThread().start();//call the newThread

try {

for (int i = 5; i > 0; i--) {

System.out.println("main Thread " + i);

t1.start();

t2.start();

Thread.sleep(1000);

}

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println("Exiting main Thread!");

}

* create a Thread class

class NewThread extends Thread {

public void run() {

System.out.println("new Thread " + this.getName());

}

} 输出�l�果�Q?/span>

main Thread 5

new Thread t1

new Thread t2

main Thread 4

main Thread 3

main Thread 2

main Thread 1

Exiting main Thread!

Implements Runnable()

package com.javathread;

public class TestThread {

/**

* @param args

public static void main(String[] args) {

// TODO Auto-generated method stub

new NewThread("one");// Create two new Thread

new NewThread("two");

// new NewThread().start();//call the newThread

try {

Thread.sleep(10000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println("Exiting main Thread!");

}

* create a Thread class

class NewThread implements Runnable {

String name;

Thread t;

NewThread(String name) {

this.name = name;

t = new Thread(this, name);

System.out.println("New Thread " + t);

t.start();

}

public void run() {

try {

for (int i = 5; i > 0; i--) {

System.out.println(name + ":" + i);

Thread.sleep(1000);

}

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

但是 SWT 的线�E�和 JDK 的有点区�?/span>

当启动一�?/span> SWT 的线�E�时候，要回�q�来操作 shell 上的控�g

必须要调�?/span> Display �?/span> SyncExec 同步或�?/span> asyncExec 异步�Q�来重新取得 shell

举个例子

如下�Q?/span>

我们新徏 SWT Application �Q�加一�?/span> button 启动另一个线�E�，

代码如下所�C�：(x��)

package com;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Shell;

public class Test {

private static Display display = Display.getDefault();

private static Shell shell = new Shell();

public static void main(String[] args) {

Test test = new Test();

test.open();

// final Shell shell = new Shell();

}

public void open() {

shell.setSize(500, 375);

shell.setText("SWT Application");

shell.open();

final Button startnewthreadButton = new Button(shell, SWT.NONE);

startnewthreadButton.addSelectionListener(new SelectionAdapter() {

public void widgetSelected(SelectionEvent e) {

new TestThread().start();

}

});

startnewthreadButton.setText("startnewthread");

startnewthreadButton.setBounds(135, 116, 90, 25);

shell.layout();

while (!shell.isDisposed()) {

if (!display.readAndDispatch())

display.sleep();

}

* create a new Thread class

private class TestThread extends Thread {

public void run() {

* call Swt controls must use Dispaly.syncExec or Display.asyncExec

if (!Test.display.isDisposed()) {

Test.display.syncExec(new Runnable() {// �q�段代码很重�?/span>

public void run() {

MessageDialog.openInformation(null, "fd", "fd");

}

});

}

如果不加加红�q�段代码直接 MessageDialog.openInformation(null,”fd�?”fd�?;

�E�序�?x��)抛出异常�?x��) ja va.lang.ExceptionInInitializerError

好了有问�?/span> 联系 edsionchen002@163.com

QQ 4384919

陈国��?/a> 2006-09-13 09:13 发表评论

SWT 学习(f��n)�W�记 2 多线�E�的烦恼

Wed, 06 Sep 2006 13:43:00 GMT

摘要: 今天学习(f��n)了下 eclipse 从入门到�_�N��的 SWT 多线�E�，但是一直有问题�Q�我感觉现在完全是按照那里面的代码写的怎么�q�是出错 org.eclipse.swt.SWTException : Failed to execut... 阅读全文

陈国��?/a> 2006-09-06 21:43 发表评论

SWT 学习(f��n)�W�记1�Q�安装破解，��单实�?按钮加文本框的事件响�?

Mon, 04 Sep 2006 00:37:00 GMT

摘要: 前段旉��? eclipse 的插�? SWT 做了一个简单的应用�E�序界面�Q�感觉没�? VC 做界面方便和强大�Q�还不时的和 AWT 冲突�Q�也可能是刚学，没有体会(x��) SWT 的优点，我把自己的掌握的写出来，大家一起交��哈�? 好了�Q�现在言�?.. 阅读全文

陈国��?/a> 2006-09-04 08:37 发表评论

Sat, 29 Jul 2006 10:48:00 GMT

 BIRT 是�ؓ(f��) Web 应用�E�序开发的��Z�� Eclipse 的开源报表系�l�，特别之处在于它是�?Java �?J2EE 为基��。BIRT 有两个主要组�Ӟ��(x��)��Z�� Eclipse 的报表设计器�Q�以�?qi��ng)部�|�到应用服务器上的运行时�l��g。BIRT 也提供了图标引擎让你能�ؓ(f��)应用增加图标�?br /> 感觉�q�个用�v来还可以�Q�简单，生成报表也很快，先在处于刚学�?f��n)阶�D�，我想应该可以嵌到自己的项目中。原本对eclipse比较熟�?zh��n)�。以后的��论文和��士论文��靠它了。HOHO

陈国��?/a> 2006-07-29 18:48 发表评论

精品久久久亚洲,欧美日韩成人综合在线一区二区,日韩电影在线看

SWT 学习(f��n)�W�记3 SWT 与多�U�程

SWT 学习(f��n)�W�记 2 多线�E�的烦恼

SWT 学习(f��n)�W�记1�Q�安装破解，���单实�?按钮加文本框的事件响�?

SWT 学习(f��n)�W�记1�Q�安装破解，��单实�?按钮加文本框的事件响�?