正如斯坦已经回答的那样,解决办法的一部分是:

button.setOpaque(false)

托邦是个极强的州,它们希望被led到really,而不是绘画背景。

button.setContentAreaFilled(false)

Beware: the exact outcome might still be highly LAF dependent - f.i. looking really bad. For synth-based (as f.i. Nimbus) you might consider to install a custom Painter configured with the gradient/colors as choosen by the user

Edit

只是双重检查:

// tell ui to not paint the background
button.setOpaque(false);
button.setContentAreaFilled(false);

// override paintComponent
protected void paintComponent(...) {
     // do custom backgroudn painting
     ...
     // let ui handle the foreground (it wont touch the background due to the false settings above)
     super.paintComponent()
}

对所有核心LAF(赢利)进行罚款

• 为避免背景绘画而设置部件不成像。

• 在方法末使用“。

看像你那样,用同样的油漆标物来描述背景和理由,因此我对案文的猜测只是与背景的结合。

Paint oldPaint = g2d.getPaint();  
g2d.setPaint(paint);  
g2d.fillRect(0, 0, width, height);  
g2d.setPaint( oldPaint ); // try adding this
g2d.drawString("Button 1", getWidth()/2, 10);
//g2d.setPaint( oldPaint );

你们凌驾于油漆配料法之上,不称其超文本。

油漆委员会负责撰写实际案文——如果它没有给你写信的话。

因此:

撰写标签说明的代码,视您如何处置重新编号,该编码可能或不会复杂

要求超官——如果要重述背景,可能不会奏效。

I think that isn t correct way to create the BackGround for Custom JButton by using paintComponent(), this BackGround is possible to change two way

(1) 替换缺省BackGround

2) override BasicButtonUI, example for MetalButtonUI, notice MetalButtonUI works only on CrossPlatformLookAndFeel == MetalLookAndFeel

EDIT(最好从Button Model中删除/处置的巴斯塔)。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.AbstractBorder;
import javax.swing.border.Border;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicButtonUI;
import javax.swing.plaf.metal.MetalButtonUI;

public class TextAreaInButton {

    private JFrame frame = new JFrame("sssssssss");
    private JButton tip1Null = new JButton(" test button ");

    public TextAreaInButton() {
        Border line, raisedbevel, loweredbevel, title, empty;
        line = BorderFactory.createLineBorder(Color.black);
        raisedbevel = BorderFactory.createRaisedBevelBorder();
        loweredbevel = BorderFactory.createLoweredBevelBorder();
        title = BorderFactory.createTitledBorder("");
        empty = BorderFactory.createEmptyBorder(1, 1, 1, 1);
        final Border compound;
        Color crl = (Color.blue);
        compound = BorderFactory.createCompoundBorder(empty, new OldRoundedBorderLine(crl));
        Color crl1 = (Color.red);
        final Border compound1;
        compound1 = BorderFactory.createCompoundBorder(empty, new OldRoundedBorderLine(crl1));
        Color crl2 = (Color.black);
        final Border compound2;
        compound2 = BorderFactory.createCompoundBorder(empty, new OldRoundedBorderLine(crl2));
        tip1Null.setFont(new Font("Serif", Font.BOLD, 14));
        tip1Null.setForeground(Color.darkGray);
        tip1Null.setPreferredSize(new Dimension(50, 30));
        tip1Null.addActionListener(new java.awt.event.ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
            }
        });
        tip1Null.setBorderPainted(true);
        tip1Null.setFocusPainted(false);
        tip1Null.setBorder(compound);
        tip1Null.setHorizontalTextPosition(SwingConstants.CENTER);
        tip1Null.setVerticalTextPosition(SwingConstants.BOTTOM);
        tip1Null.setUI(new ModifButtonUI());

        tip1Null.getModel().addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                ButtonModel model = (ButtonModel) e.getSource();
                if (model.isRollover()) {
                    tip1Null.setBorder(compound1);
                } else {
                    tip1Null.setBorder(compound);
                }
                if (model.isPressed()) {
                    tip1Null.setBorder(compound2);
                }
            }
        });
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(tip1Null, BorderLayout.CENTER);
        frame.setLocation(150, 150);
        frame.setPreferredSize(new Dimension(310, 75));
        frame.setLocationRelativeTo(null);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                TextAreaInButton taib = new TextAreaInButton();
            }
        });
    }
}

class OldRoundedBorderLine extends AbstractBorder {

    private final static int MARGIN = 5;
    private static final long serialVersionUID = 1L;
    private Color color;

    OldRoundedBorderLine(Color clr) {
        color = clr;
    }

    public void setColor(Color clr) {
        color = clr;
    }

    @Override
    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        ((Graphics2D) g).setRenderingHint(
                RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g.setColor(color);
        g.drawRoundRect(x, y, width, height, MARGIN, MARGIN);
    }

    @Override
    public Insets getBorderInsets(Component c) {
        return new Insets(MARGIN, MARGIN, MARGIN, MARGIN);
    }

    @Override
    public Insets getBorderInsets(Component c, Insets insets) {
        insets.left = MARGIN;
        insets.top = MARGIN;
        insets.right = MARGIN;
        insets.bottom = MARGIN;
        return insets;
    }
}

class ModifButtonUI extends BasicButtonUI {

    //private static final ModifButtonUI buttonUI = new ModifButtonUI();

    ModifButtonUI() {
    }

    public static ComponentUI createUI(JComponent c) {
        return new ModifButtonUI();
    }

    @Override
    public void paint(Graphics g, JComponent c) {
        //final Color color1 = new Color(230, 255, 255, 0);
        //final Color color2 = new Color(255, 230, 255, 64);
        final Color color1 = new Color(00, 0, 200, 0);
        final Color color2 = new Color(255, 230, 255, 64);
        final Color alphaColor = new Color(00, 200, 230, 64);
        final Color color3 = new Color(
                alphaColor.getRed(), alphaColor.getGreen(), alphaColor.getBlue(), 0);
        final Color color4 = new Color(
                alphaColor.getRed(), alphaColor.getGreen(), alphaColor.getBlue(), 64);
        super.paint(g, c);
        Graphics2D g2D = (Graphics2D) g;
        GradientPaint gradient1 = new GradientPaint(
                0.0F, (float) c.getHeight() / (float) 2, color1, 0.0F, 0.0F, color2);
        Rectangle rec1 = new Rectangle(0, 0, c.getWidth(), c.getHeight() / 2);
        g2D.setPaint(gradient1);
        g2D.fill(rec1);
        GradientPaint gradient2 = new GradientPaint(
                0.0F, (float) c.getHeight() / (float) 2, color3, 0.0F, c.getHeight(), color4);
        Rectangle rec2 = new Rectangle(0, c.getHeight() / 2, c.getWidth(), c.getHeight());
        g2D.setPaint(gradient2);
        g2D.fill(rec2);
    }

    @Override
    protected void paintText(Graphics g, AbstractButton b, Rectangle textRect, String text) {
        Font f = b.getFont();
        g.setFont(f);
        FontMetrics fm = g.getFontMetrics(f);

        if (b.isEnabled()) {
            g.setColor(b.getForeground());
            g.drawString(text, textRect.x, textRect.y + fm.getAscent());
        } else {
            g.setColor(b.getBackground().brighter());
            g.drawString(text, textRect.x, textRect.y + fm.getAscent());
            g.setColor(b.getBackground().darker());
            g.drawString(text, textRect.x + 1, textRect.y + fm.getAscent() + 1);

        }
    }

    @Override
    public void paintButtonPressed(Graphics g, AbstractButton b) {
        paintText(g, b, b.getBounds(), b.getText());
        g.setColor(Color.red.brighter());
        g.fillRect(0, 0, b.getSize().width, b.getSize().height);
    }

    public void paintBorder(Graphics g) {
    }

    @Override
    protected void paintFocus(Graphics g, AbstractButton b,
            Rectangle viewRect, Rectangle textRect, Rectangle iconRect) {
    }
}