swing怎么在图形上添加文字？急

使用 BufferedImage 和 Graphics2D

BufferedImage source = ImageIO.read(...)

BufferedImage target = new BufferedImage(source.getWidth(),source.getHeight(), source.getType())

Graphics2D g2d = target.createGraphics()

g2d.drawImage(source, 0, 0, null)

g2d.setPaint(Color.BLACK)

g2d.drawString( "Hello", 50,50)

g2d.dispose()

就这样图片添加了文字

在java swing中需要为容器添加图片，或者背景图片。

提供两种简单的解决方案，一种利用JPanel，另一种利用JLabel

1.JPanel（源代码）

package oo

import java.awt.Graphics

import java.awt.Image

import java.io.File

import javax.swing.ImageIcon

import javax.swing.JFrame

import javax.swing.JPanel

public class Drawing {

JFrame jframe = new JFrame()

public static JPanel GImage = null

public Drawing() {

initFrame()

}

// 初始化窗口

public void initFrame() {

// 利用JPanel添加背景图片

GImage = new JPanel() {

protected void paintComponent(Graphics g) {

ImageIcon icon = new ImageIcon("image\\benbenla.jpg")

Image img = icon.getImage()

g.drawImage(img, 0, 0, icon.getIconWidth(),

icon.getIconHeight(), icon.getImageObserver())

jframe.setSize(icon.getIconWidth(), icon.getIconHeight())

}

}

jframe.setTitle("测试背景图片")

jframe.add(GImage)

jframe.pack()

jframe.setVisible(true)

jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

}

public static void main(String[] args) {

new Drawing()

}

}

2.JLabel源代码

package swing.draw

import java.awt.Image

import javax.swing.ImageIcon

import javax.swing.JFrame

import javax.swing.JLabel

public class Drawing2 {

JLabel jlpic = new JLabel()

JFrame jframe = new JFrame()

public Drawing2() {

init1Frame()

}

public void init1Frame() {

ImageIcon icon = new ImageIcon("image\\benbenla.jpg")

icon.setImage(icon.getImage().getScaledInstance(icon.getIconWidth(),

icon.getIconHeight(), Image.SCALE_DEFAULT))

System.out.println(icon.getIconHeight() + "" + icon.getIconWidth())

jlpic.setBounds(0, 0, 1366, 768)

jlpic.setHorizontalAlignment(0)

jlpic.setIcon(icon)

jframe.setSize(1366, 768)

jframe.add(jlpic)

jframe.pack()

jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

jframe.setVisible(true)

}

public static void main(String args[]) {

new Drawing2()

}

}

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