一些小玩意 
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import javax.swing.*;
import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

public class temp extends JFrame {
    private DrawingPanel drawingPanel;//绘图面板
    private int shapeType;//绘制形状
    private int x=150,y=150;//绘制图形的位置(即坐标)
    private final int SIZE= 100;(图形大小)
    public temp(){
        JFrame frame = new JFrame();//框架
        frame.setLayout(new BorderLayout());//布局类型
        JPanel panel1 = new JPanel();
        JRadioButton circle = new JRadioButton("圆",true);
        JRadioButton square = new JRadioButton("矩形");
        ButtonGroup bGroup = new ButtonGroup();//这俩按钮构成一个互斥组
            bGroup.add(circle);
            bGroup.add(square);
            panel1.add(circle);
            panel1.add(square);
        ItemListener Listener = new ItemListener() {//监听
            @Override
            public void itemStateChanged(ItemEvent e) {
                if (e.getSource() == circle) shapeType=0;//当前选中"圆"文本的按钮
                else if (e.getSource() == square) shapeType=1;//当前选中"矩形"文本的按钮
                drawingPanel.repaint();//按任何按钮都要更新
            }
        };
        circle.addItemListener(Listener);
        square.addItemListener(Listener);
        drawingPanel = new DrawingPanel();
        frame.add(panel1,BorderLayout.NORTH);
        frame.add(drawingPanel,BorderLayout.CENTER);
        JPanel panel2 = new JPanel();
        JButton up=new JButton("上移");
        JButton down=new JButton("下移");
        JButton left=new JButton("左移");
        JButton right=new JButton("右移");
        up.addActionListener(e -> {
            y-=10;
            drawingPanel.repaint();
        });
        down.addActionListener(e -> {
            y+=10;
            drawingPanel.repaint();
        });//这里是y轴正方向是向下所以up是-,down是+
        left.addActionListener(e -> {
            x-=10;
            drawingPanel.repaint();
        });
        right.addActionListener(e -> {
            x+=10;
            drawingPanel.repaint();
        });
        panel2.add(up);
        panel2.add(down);
        panel2.add(left);
        panel2.add(right);
        frame.add(panel2,BorderLayout.SOUTH);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.setSize(300,300);
        frame.setVisible(true);
    }
    class DrawingPanel extends JPanel {
        @Override//重写方法来绘图
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);//清屏用
            if (shapeType==0) g.drawOval(x, y, SIZE, SIZE);//画圆
            else g.drawRect(x, y, SIZE, SIZE);//画矩形
        }
    }
    public static void main(String[] args) {
        new temp();
    }
}

说些什么吧！

waline