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📜  Java Swing-JColorChooser

📅  最后修改于: 2020-09-30 06:09:08             🧑  作者: Mango

Java JColorChooser

JColorChooser类用于创建颜色选择器对话框，以便用户可以选择任何颜色。它继承了JComponent类。

JColorChooser类声明

我们来看一下javax.swing.JColorChooser类的声明。

public class JColorChooser extends JComponent implements Accessible

常用的构造函数：

Constructor Description
JColorChooser() It is used to create a color chooser panel with white color initially.
JColorChooser(color initialcolor) It is used to create a color chooser panel with the specified color initially.

常用方法：

Method Description
void addChooserPanel(AbstractColorChooserPanel panel) It is used to add a color chooser panel to the color chooser.
static Color showDialog(Component c, String title, Color initialColor) It is used to show the color chooser dialog box.

Java JColorChooser示例

import java.awt.event.*;  
import java.awt.*;  
import javax.swing.*;   
public class ColorChooserExample extends JFrame implements ActionListener {  
JButton b;  
Container c;  
ColorChooserExample(){  
    c=getContentPane();  
    c.setLayout(new FlowLayout());       
    b=new JButton("color");  
    b.addActionListener(this);       
    c.add(b);  
}  
public void actionPerformed(ActionEvent e) {  
Color initialcolor=Color.RED;  
Color color=JColorChooser.showDialog(this,"Select a color",initialcolor);  
c.setBackground(color);  
}  
  
public static void main(String[] args) {  
    ColorChooserExample ch=new ColorChooserExample();  
    ch.setSize(400,400);  
    ch.setVisible(true);  
    ch.setDefaultCloseOperation(EXIT_ON_CLOSE);  
}  
}

输出：

带有ActionListener的Java JColorChooser示例

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ColorChooserExample extends JFrame implements ActionListener{
JFrame f;
JButton b;
JTextArea ta;
ColorChooserExample(){
f=new JFrame("Color Chooser Example.");
b=new JButton("Pad Color");
b.setBounds(200,250,100,30);
ta=new JTextArea();
ta.setBounds(10,10,300,200);
b.addActionListener(this);
f.add(b);f.add(ta);
f.setLayout(null);
f.setSize(400,400);
f.setVisible(true);
}
public void actionPerformed(ActionEvent e){
Color c=JColorChooser.showDialog(this,"Choose",Color.CYAN);
ta.setBackground(c);
}
public static void main(String[] args) {
new ColorChooserExample();
}
}

输出：