Swingr的JTextField、JPasswordField设置圆角输入框

package com.xxx.xxx.xxx; import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints; import javax.swing.border.Border; /**
 * Swing
 * 设置圆角边框（可以自定义边框的颜色）
 * 可以为button，文本框等人以组件添加边框
 * 使用方法：
 * JButton close = new JButton(" 关 闭 ");
 * close.setOpaque(false);// 设置原来按钮背景透明
 * close.setBorder(new RoundBorder());黑色的圆角边框
 * close.setBorder(new RoundBorder(Color.RED)); 红色的圆角边框
 * 
 * @author Monsoons
 */ public class RoundBorder implements Border {
private Color color; private int arcH = 15;
private int arcW = 15; public RoundBorder() {
this(Color.BLACK);
// 如果实例化时，没有传值
// 默认是黑色边框
} public RoundBorder(Color color) {
this.color = color;
} public Insets getBorderInsets(Component c) { // top:可以调节光标与边枉的距离, 间接影响高度
// left:可以调节光标与边枉的距离
// bottom:可以调节光标与边枉的距离, 间接影响高度
// right:可以调节光标与边枉的距离
return new Insets(10, 15, 10, 15);
} public boolean isBorderOpaque() {
return false;
} // 实现Border（父类）方法
@Override
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
// g.setColor(color);
// g.drawRoundRect(0, 0, c.getWidth() - 1, c.getHeight() - 1, arcH, arcW); Graphics2D g2d = (Graphics2D) g.create(); g2d.setColor(color);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.drawRoundRect(0, 0, c.getWidth() - 1, c.getHeight() - 1, arcH, arcW); g2d.dispose();
}
}

/*Swing的圆角输入框
发布时间：2018-03-01 来源：网络 上传者：用户
关键字: 圆角 输入 Swing
发表文章
摘要：最近看了flyPig前辈的圆角高亮Buttonhttp://flypig.iteye.com/blog/389253,依葫芦画瓢,自己做了一个简单的圆角输入框。importjava.awt.Color;importjava.awt.FlowLayout;importjava.awt.Graphics;importjava.awt.Graphics2D;importjava.awt.Insets;importjava.awt.RenderingHints;importjava. 最近看了flyPig前辈的圆角高亮Buttonhttp://flypig.iteye.com/blog/389253,依葫芦画瓢,自己做了一个简单的圆角输入框。*/ import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.RoundRectangle2D;
import javax.swing.JFrame;
import javax.swing.JTextField; public class MyTextField extends JTextField {
private static final long serialVersionUID = -1946802815417758252L; public MyTextField(int columns) {
super(columns);
//
setMargin(new Insets(0, 5, 0, 5));
} @Override
protected void paintBorder(Graphics g) {
int h = getHeight();// 从JComponent类获取高宽
int w = getWidth();
Graphics2D g2d = (Graphics2D) g.create();
Shape shape = g2d.getClip();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setClip(shape);
g2d.drawRoundRect(0, 0, w - 2, h - 2, h, h);
g2d.dispose();
super.paintBorder(g2d);
} public static void main(String[] args) {
JFrame jf = new JFrame();
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setSize(300, 200);
jf.setLayout(new FlowLayout());
MyTextField text = new MyTextField(20);
jf.add(text);
jf.setVisible(true);
}
}