dogyears.java

JAVA编写的一个简单计算年龄的计算器,首先输入DOG YEARS的数值,HUMAN YEARS得到的结果相应的乘以10 得出!很明朗!

package myPackage;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class DogYears extends JFrame {
	
	private static final long serialVersionUID = 1L;
	private static final int DOG_YEARS_PER_HUMANYEARS=10; 
	private JTextField humanYearsTF = new JTextField(3);
	private JTextField dogYearsTF = new JTextField(3);
	
	DogYears(){
		
		JButton convertButton = new JButton("Convert");
		convertButton.addActionListener(new ConverBtnlistener());
		JPanel content = new JPanel();
		content.setLayout(new FlowLayout());
		
		content.add(new JLabel("Dog Years"));                                                                                                                                                
		content.add(dogYearsTF);
		content.add(convertButton);
		content.add(new JLabel("Human Years"));
		content.add(humanYearsTF);
		
		setContentPane(content);
		pack();
		
		setTitle("Convertor--Dog years to Human years");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLocationRelativeTo(null);
		
	}
	
	class ConverBtnlistener implements ActionListener{
		public void actionPerformed(ActionEvent e){
			String dyString = dogYearsTF.getText();
			int dogYears = Integer.parseInt(dyString);
			int humanYears = dogYears*DOG_YEARS_PER_HUMANYEARS;
			humanYearsTF.setText("" +humanYears);
		}
	}
		
/*	private class GUIactionListener implements ActionListener{
		public void actionPerformed(ActionEvent event){
			String actionCmd = event.getActionCommand();
			if(actionCmd.equals("Convert")){
				System.out.println("Converted...");
				return;
			}
			if(actionCmd.equals("add")){
				System.out.println("add...");
				return;
			}
			This is same old way for the listener not practical      
		}
		
	}*/
	public static void main(String[] args) {
		DogYears window = new DogYears();
		window.setSize(150, 200);
		window.setVisible(true);
	}
        
}