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SWT/JFace_002_事件4种不同写法

Eclipse读书 
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一、匿名内部类写法

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");
		// 匿名内部类实现事件
		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();
	}
}

 

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 {
	private Shell shell = null;
	private Button button = 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());
		
		button = new Button(shell, SWT.NONE);
		button.setText("hello");
		// 匿名内部类方式实现事件
		button.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent arg0) {
				System.out.println("widgetSelected()");
			}
		});
	}

	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();
	}
}

 

二、命名内部类写法

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 ButtonSelectionListener());
		
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
	
	// 命名内部类实现事件
	private static class ButtonSelectionListener extends SelectionAdapter {
		@Override
		public void widgetSelected(SelectionEvent e) {
			System.out.println("点击了hello按钮...");
		}
	}
}

 

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 {
	private Shell shell = null;
	private Button button = 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());
		button = new Button(shell, SWT.NONE);
		button.setText("hello");
		button.addSelectionListener(new ButtonSelectionListener());
	}
	
	// 命名内部类方式实现事件
	private class ButtonSelectionListener extends SelectionAdapter {
		public void widgetSelected(SelectionEvent e) {
			System.out.println("widgetSelected()");
		}
	}

	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、外部类写法

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 ButtonSelectionListener());
		
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}

// 外部类实现事件
class ButtonSelectionListener extends SelectionAdapter {
	@Override
	public void widgetSelected(SelectionEvent e) {
		System.out.println("点击了hello按钮...");
	}
}

 

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 {
	private Shell shell = null;
	private Button button = 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());
		
		button = new Button(shell, SWT.NONE);
		button.setText("hello");
		// 外部类方式实现事件
		button.addSelectionListener(new ButtonSelectionListener());
	}

	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();
	}
}

//外部类实现事件
class ButtonSelectionListener extends SelectionAdapter {
	@Override
	public void widgetSelected(SelectionEvent e) {
		System.out.println("widgetSelected()");
	}
}

 

四、实现监听接口的写法

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 extends SelectionAdapter {// 或者实现SelectionListener接口
	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 HelloWorld());
		
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
	
	@Override
	public void widgetSelected(SelectionEvent e) {
		System.out.println("点击了hello按钮...");
	}
}

 

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 extends SelectionAdapter {// 或者实现SelectionListener接口
	private Shell shell = null;
	private Button button = 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());
		
		button = new Button(shell, SWT.NONE);
		button.setText("hello");
		button.addSelectionListener(new HelloWorld());
	}
	
	@Override
	public void widgetSelected(SelectionEvent e) {
		System.out.println("widgetSelected()");
	}

	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();
	}
}

 

 《ECLIPSE从入门到精通》 陈刚 著  读书笔记

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| SWT/JFace_001_第一个SWT程序
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