Swing之JTextField中添加图片

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先看一张最终效果图：

1、继承来自JPasswordField的文本框

import java.awt.Graphics;import java.awt.Insets;import javax.swing.ImageIcon;import javax.swing.JPasswordField;import javax.swing.JTextField;/** * * @author WZH */public class JTextFieldPassword extends JPasswordField {    private ImageIcon icon;    public JTextFieldPassword() {//        获取当前路径下的图片        icon = new ImageIcon(getClass().getResource("./lock.png"));        Insets insets = new Insets(0, 20, 0, 0);        //设置文本输入距左边20        this.setMargin(insets);    }        @Override    public void paintComponent(Graphics g) {        Insets insets = getInsets();        super.paintComponent(g);        int iconWidth = icon.getIconWidth();        int iconHeight = icon.getIconHeight();        int Height = this.getHeight();        //在文本框中画上之前图片        icon.paintIcon(this, g, (insets.left - iconWidth)/2, (Height - iconHeight) / 2);    }}

2、继承来自JTextField的文本框

import java.awt.Graphics;import java.awt.Insets;import javax.swing.ImageIcon;import javax.swing.JTextField;/** * * @author WZH */public class JTextFieldUser extends JTextField {    private ImageIcon icon;    public JTextFieldUser() {        //获取当前路径下的图片        icon = new ImageIcon(getClass().getResource("./user.png"));        Insets insets = new Insets(0, 20, 0, 0);        //设置文本输入距左边20        this.setMargin(insets);    }        @Override    public void paintComponent(Graphics g) {        Insets insets = getInsets();        super.paintComponent(g);        int iconWidth = icon.getIconWidth();        int iconHeight = icon.getIconHeight();        int Height = this.getHeight();        //在文本框中画上之前图片        icon.paintIcon(this, g, (insets.left - iconWidth)/2, (Height - iconHeight) / 2);    }}

在文本框中添加图片的方法主要就在重写JtextField的paintComponent(Graphics g)方法，先将图片绘制在文本框中，这里应该注意的是super.paintComponent(g)方法应该在图片绘制前调用，否则会出现图片未绘上后被清除的情况。

示例代码：http://download.csdn.net/detail/a78460750/6473359