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java swing界面刷新
180浏览 · 2023-08-02 18:09:18
在 Java Swing 中，要刷新界面，你可以使用 `repaint()` 方法来触发重绘操作。`repaint()` 方法会调用组件的 `paintComponent()` 方法，从而重新绘制界面。
以下是一个简单的示例[代码](https://geek.csdn.net/educolumn/1572ef9b473b4e00f6b2bf6d428b7c27?spm=1055.2569.3001.10083)，演示了如何刷新界面：
```java
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Graphics;
public class [refresh](https://geek.csdn.net/educolumn/15b2f1f3252514d2f502f4993493744f?spm=1055.2569.3001.10083)Demo extends JPanel {
private Color backgroundColor;
public [refresh](https://geek.csdn.net/educolumn/15b2f1f3252514d2f502f4993493744f?spm=1055.2569.3001.10083)Demo() {
this.backgroundColor = Color.WHITE;
@Override
protected void paintComponent(Graphics g) {
su[per](https://geek.csdn.net/educolumn/2c6ed1be7edac16b3c9a0c3228eaff0c?spm=1055.2569.3001.10083).paintComponent(g);
g.setColor(backgroundColor);
g.fillRect(0, 0, [get](https://geek.csdn.net/educolumn/31aebce56f4ecc5451aac3a194ff6259?spm=1055.2569.3001.10083)Width(), getHeight());
public void setBackgroundColor(Color color) {
this.backgroundColor = color;
repaint(); // 刷新界面