?? corner.java
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import java.awt.*;import javax.swing.*;/* Corner.java is used by ScrollDemo.java. */public class Corner extends JComponent { protected void paintComponent(Graphics g) { // Fill me with dirty brown/orange. g.setColor(new Color(230, 163, 4)); g.fillRect(0, 0, getWidth(), getHeight()); }}?? 快捷鍵說明
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