Java swing BasicTextFieldUI绘画问题

Question

我正在一个项目中，我需要更改JTextFields的 style 。我扩展了 BasicTextFieldUI，并覆盖了paintSafely方法，但是，当绘制组件时，它会绘制 border （即使边框设置为null）。我尝试查看BasicTextUI类的内部，看能画出什么边界的东西，但是我什么也没找到。

问题，

为什么此代码将在组件周围创建边框？

这是我的代码：

public class CustomTextField extends BasicTextFieldUI{

    int borderThickness, edgeRoundness;

    @Override
    protected void paintSafely(Graphics g) {

        JComponent c = (JComponent)this.getComponent();
        Graphics2D g2 = (Graphics2D)g;
        g2.setColor(c.getBackground());

        borderThickness = 2;
        edgeRoundness = 20;

        g2.setColor(c.getForeground());
        g2.fillRoundRect(0, 0, c.getWidth(), c.getHeight(), edgeRoundness+5, edgeRoundness+5);
        g2.drawRoundRect(0, 0, c.getWidth(), c.getHeight(), edgeRoundness+5, edgeRoundness+5);

        g2.setColor(c.getBackground());
        g2.fillRoundRect(borderThickness, borderThickness, c.getWidth()-(int)(borderThickness*2.5), c.getHeight()-(int)(borderThickness*2.5), edgeRoundness, edgeRoundness);
        g2.drawRoundRect(borderThickness, borderThickness, c.getWidth()-(int)(borderThickness*2.5), c.getHeight()-(int)(borderThickness*2.5), edgeRoundness, edgeRoundness);


        super.paintSafely(g);
    }

}

可能是什么错误？还有其他方法可以用来绘制组件吗？

Answer 1

我在这篇文章中找到了答案！看来，通过将边框设置为null，我对PLAF说过要使用它自己的边框。 Swing JTextField how to remove the border?