实现鼠标拖动划线，很适合小白呢！加油＾０＾~

最新推荐文章于 2024-05-23 13:49:51 发布

原创最新推荐文章于 2024-05-23 13:49:51 发布 · 489 阅读

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本文介绍了一个使用Java实现的简单绘图应用，通过监听鼠标事件来绘制线条。该应用利用了java.awt包下的Frame、Graphics和MouseListener接口，当用户按下鼠标并在窗口中拖动时，会在释放鼠标时在窗口上绘制一条从按下位置到释放位置的直线。

import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

public class TestCopy implements MouseListener{
Frame f;
int x1,y1,x2,y2;
Graphics g;

TestCopy(){
	f=new Frame();
	f.addMouseListener(this);
	f.setSize(300,200);
	f.setVisible(true);
	
}

public static void main(String[] args) {
	// TODO Auto-generated method stub
	new TestCopy();

}

@Override
public void mouseClicked(MouseEvent e) {
	// TODO Auto-generated method stub
	
}

@Override
public void mousePressed(MouseEvent e) {
	// TODO Auto-generated method stub
	x1=e.getX();y1=e.getY();
	
}

@Override
public void mouseReleased(MouseEvent e) {
	// TODO Auto-generated method stub
	x2=e.getX();y2=e.getY();
	g=f.getGraphics();
	g.drawLine(x1, y1, x2, y2);
	
}

@Override
public void mouseEntered(MouseEvent e) {
	// TODO Auto-generated method stub
	
}

@Override
public void mouseExited(MouseEvent e) {
	// TODO Auto-generated method stub
	
}

}