我是 Intellij Idea GUI 表單的初學者。而且我不知道如何為表單設定漸變背景。有人能幫我嗎？謝謝。
我的布局
這是我目前的布局。我想使用漸變背景而不是藍色，我該怎么做？
uj5u.com熱心網友回復：
先讓JFrame的背景透明。
frame.setBackground(new Color(0,0,0,0));
創建漸變涂料，并填充面板。
JPanel panel = new javax.swing.JPanel() {
protected void paintComponent(Graphics g) {
Paint p = new GradientPaint(0.0f, 0.0f, new Color(R, G, B, 0), getWidth(), getHeight(), new Color(R, G, B, 255), true);
Graphics2D g2d = (Graphics2D)g;
g2d.setPaint(p);
g2d.fillRect(0, 0, getWidth(), getHeight());
}
}
將面板作為內容窗格分配給框架。
frame.setContentPane(panel);
例子
請參閱下面的基于漸變的半透明視窗示例。
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagLayout;
import java.awt.Paint;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UnsupportedLookAndFeelException;
public class Tester {
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException {
JFrame.setDefaultLookAndFeelDecorated(true);
// Create the GUI on the event-dispatching thread
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
createWindow();
}
});
}
private static void createWindow() {
JFrame frame = new JFrame("Translucent Window");
frame.setDefaultCloseOperation(
JFrame.EXIT_ON_CLOSE
);
createUI(frame);
frame.setVisible(true);
}
private static void createUI(JFrame frame){
frame.setLayout(new GridBagLayout());
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
frame.setBackground(new Color(0,0,0,0));
JPanel panel = new javax.swing.JPanel() {
protected void paintComponent(Graphics g) {
if (g instanceof Graphics2D) {
final int R = 100;
final int G = 100;
final int B = 100;
Paint p = new GradientPaint(0.0f, 0.0f, new Color(R, G, B, 0),
getWidth(), getHeight(), new Color(R, G, B, 255), true);
Graphics2D g2d = (Graphics2D)g;
g2d.setPaint(p);
g2d.fillRect(0, 0, getWidth(), getHeight());
} else {
super.paintComponent(g);
}
}
};
panel.setLayout(new GridBagLayout());
panel.add(new JButton("Hello World"));
frame.setContentPane(panel);
}
}
轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/469085.html
標籤：爪哇 智能理念 背景 坡度 intellij-14