【JAVA】简单按钮，输入，输出界面——Crawler界面

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.*;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class Crawler extends JFrame {
public static final int BOARD_WIDTH = 540;
public static final int BOARD_HEIGHT = 570;
public static final int X_LOCATION = 100;
public static final int Y_LOCATION = 50;

//把节目分为上中三个Panel
JPanel northPanel = new JPanel();
JPanel centerPanel = new JPanel();
JPanel southPanel = new JPanel();

//输入
JTextField txtField = new JTextField(30);
JLabel labelURL = new JLabel("Starting URL: ", JLabel.RIGHT);
//输出
JTextArea txtArea = new JTextArea(10,40);
JLabel labelTxt = new JLabel("Result");

//按钮
JButton startButton = new JButton("start");
JButton cancelButton = new JButton("cancel");



public void launchFrame() throws Exception{
//界面初始化
this.setLocation(X_LOCATION, Y_LOCATION);
this.setSize(BOARD_WIDTH, BOARD_HEIGHT);
this.setResizable(false);
this.setVisible(true);
this.setLayout(new GridLayout(3,1)); //总体为三行一列布局
this.add(northPanel);
this.add(centerPanel);
this.add(southPanel);

northPanel.add(labelURL);
northPanel.add(txtField);
centerPanel.setLayout(new FlowLayout());
centerPanel.add(labelTxt);
centerPanel.add(txtArea);
southPanel.setLayout(new FlowLayout());
southPanel.add(startButton);
southPanel.add(cancelButton);

startButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String url = txtField.getText();
txtArea.append(url+"\n");
}
});
cancelButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txtArea.setText("");
}
});
this.addWindowListener(new WindowAdapter(){
public void windowClosing (WindowEvent e){
System.exit(0);
}
});
}

public static void main(String[] args)throws Exception {
new Crawler().launchFrame();
}

}

转载于:https://www.cnblogs.com/sherlcok/archive/2011/05/27/2060282.html