text4.java

此文件是一个java的图形程序,功能是输入圆的坐标和大小,就能生成相应的圆

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.Graphics;
import java.awt.Image;
public class Text4 extends JFrame implements ActionListener
{
	JLabel JL1,JL2,JL3;
	JTextField jt1,jt2,jt3;
	JButton jb1,jb2;
	Canvas c;
	public Text4()
	{
		this.setTitle("aa");
		Container cc=getContentPane();
		cc.setLayout(null);
//		Panel p=new Panel();
		JL1=new JLabel("X坐标");
		JL1.setBounds(10,10,60,20);
		cc.add(JL1);
		jt1=new JTextField();
		jt1.setBounds(80,10,60,20);
		cc.add(jt1);
		
		JL2=new JLabel("Y坐标");
		JL2.setBounds(150,10,60,20);
		cc.add(JL2);
		jt2=new JTextField();
		jt2.setBounds(220,10,60,20);
		cc.add(jt2);
		
		JL3=new JLabel("半径");
		JL3.setBounds(300,10,60,20);
		cc.add(JL3);
		jt3=new JTextField();
		jt3.setBounds(370,10,60,20);
		cc.add(jt3);
		
		jb1=new JButton("确定");
		jb1.setBounds(450,10,60,20);
		cc.add(jb1);
		jb1.addActionListener(this);
		
		jb2=new JButton("重置");
		jb2.setBounds(530,10,60,20);
		cc.add(jb2);
		jb2.addActionListener(this);
		
		c=new Canvas();
		cc.add(c);
//		c.setBackground(Color.cyan);
		c.setBounds(40,80,300,200);
		
		this.setBounds(10,10,800,600);
		this.setVisible(true);
	}
	
	public static void main(String args[])
	{
		Text4 aaa=new Text4();
	}
	
	public void actionPerformed (ActionEvent e)
	{
		if(e.getSource()==jb1)
		{
			int a1=Integer.parseInt(jt1.getText());
			int a2=Integer.parseInt(jt2.getText());
			int a3=Integer.parseInt(jt3.getText());
			c.getGraphics().drawOval(a1,a2,a3,a3);
		}
		if(e.getSource()==jb2)
		{
			c.repaint();
			jt1.setText("");
			jt2.setText("");
			jt3.setText("");
		}
	}
}