在Java的GUI程式設計中,如何檢查是否啟用抗鋸齒?
以下範例演示如何使用RenderingHints
類來檢查是否開啟了抗鋸齒。
package com.yiibai;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class CheckAntialiasing {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.add(new MyComponent());
frame.setSize(300, 300);
frame.setVisible(true);
}
}
class MyComponent extends JComponent {
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
RenderingHints rh = g2.getRenderingHints();
boolean bl = rh.containsValue(RenderingHints.VALUE_ANTIALIAS_ON);
System.out.println(bl);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
}
}
上述程式碼範例將產生以下結果。
false
false