SWT/JFace_001_第一个SWT程序

一、搭建开发环境[eclipse3.5.2的plugins目录中有以下jar包]

1. swt 环境[如仅仅是swt编程只要下面一个jar包]： 
    org.eclipse.swt.win32.win32.x86_3.5.2.v3557f.jar

2. jface环境[如程序中需要使用到jface中的控件等，需要增加以下jar包]： 
    org.eclipse.jface_3.5.2.M20100120-0800.jar 
    org.eclipse.core.commands_3.5.0.I20090525-2000.jar 
    org.eclipse.equinox.common_3.5.1.R35x_v20090807-1100.jar

二、开发第一个SWT应用

HelloWorld源代码

import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class HelloWorld {
	public static void main(String[] args) {
		Display display = Display.getDefault();
		Shell shell = new Shell();
		shell.setText("第一个SWT程序");
		shell.setSize(new Point(300, 200));
		shell.setLayout(new GridLayout());
		//......
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}

 
HelloWorld另一种写法

import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class HelloWorld {
	private Shell shell = null;

	private void createShell() {
		shell = new Shell();
		shell.setText("第一个SWT程序");
		shell.setSize(new Point(300, 200));
		shell.setLayout(new GridLayout());
	}

	public static void main(String[] args) {
		Display display = Display.getDefault();
		HelloWorld thisClass = new HelloWorld();
		thisClass.createShell();
		thisClass.shell.open();
		while (!thisClass.shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}

 

三、程序解释

 

四、增加一个按钮并给该按钮增加事件

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class HelloWorld {
	public static void main(String[] args) {
		Display display = Display.getDefault();
		Shell shell = new Shell();
		shell.setText("第一个SWT程序");
		shell.setSize(new Point(300, 200));
		shell.setLayout(new GridLayout());
		
		Button button = new Button(shell, SWT.NONE);
		button.setText("hello");
		button.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				System.out.println("点击了hello按钮...");
			}
		});
		
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}

 

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