Java 是一種面向對象的編程語言，擁有廣泛的應用場景。其中，Java 的移動直線和圓代碼較為常見，下面為大家介紹一些相關代碼實現(xiàn)，代碼使用pre標簽。

1. 移動直線的代碼實現(xiàn)：

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
public class MoveLine extends JPanel implements ActionListener{
private Timer timer;
private int x1;
private int y1;
private int x2;
private int y2;
private int deltaX = 1;
private int deltaY = 1;
public MoveLine(){
timer = new Timer(10, this);
timer.start();
x1 = 0;
y1 = 0;
x2 = 100;
y2 = 100;
}
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.drawLine(x1, y1, x2, y2);
}
public void actionPerformed(ActionEvent e){
if(x1+deltaX<0 || x1+deltaX>this.getWidth()-100) deltaX=-deltaX;
if(y1+deltaY<0 || y1+deltaY>this.getHeight()-100) deltaY=-deltaY;
x1+=deltaX;
y1+=deltaY;
x2+=deltaX;
y2+=deltaY;
repaint();
}
public static void main(String[] args){
JFrame frame = new JFrame("移動直線");
frame.add(new MoveLine());
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

2. 移動圓的代碼實現(xiàn)：

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
public class MoveCircle extends JPanel implements ActionListener{
private Timer timer;
private int x;
private int y;
private int deltaX = 3;
private int deltaY = 3;
public MoveCircle(){
timer = new Timer(10, this);
timer.start();
x = 0;
y = 0;
}
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
Ellipse2D circle = new Ellipse2D.Double(x, y, 100, 100);
g2d.draw(circle);
}
public void actionPerformed(ActionEvent e){
if(x+deltaX<0 || x+deltaX>this.getWidth()-100) deltaX=-deltaX;
if(y+deltaY<0 || y+deltaY>this.getHeight()-100) deltaY=-deltaY;
x+=deltaX;
y+=deltaY;
repaint();
}
public static void main(String[] args){
JFrame frame = new JFrame("移動圓");
frame.add(new MoveCircle());
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

以上就是 Java 移動直線和圓的代碼實現(xiàn)。如有需要，可以參考以上代碼進行開發(fā)，實現(xiàn)想要的功能。