以下是我的代碼，但是點擊橢圓外到本來的按鈕方形區(qū)域依然會觸發(fā)事件，怎么解決。import?java.awt.Color; import?java.awt.Font; import?java.awt.Graphics; import?java.awt.Graphics2D; import?java.awt.RenderingHints; import?java.awt.event.MouseEvent; import?java.awt.event.MouseListener; import?javax.swing.JButton; // public?class?StartJButton?extends?JButton?implements?MouseListener{ private?static?final?long?serialVersionUID?=?1L; public?StartJButton(){ this.setBackground(new?Color(65,?201,?252,?50)); this.addMouseListener(this); } public?StartJButton(String?text){ super(text); this.setBackground(new?Color(65,?201,?252,?50)); this.addMouseListener(this); } public?void?paintComponent(Graphics?g){ Graphics2D?g2?=?(Graphics2D)?g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,?RenderingHints.VALUE_ANTIALIAS_ON); g2.setColor(super.getBackground()); g2.fillOval(0,?0,?super.getWidth(),?super.getHeight()); super.setContentAreaFilled(false); g2.setColor(Color.white); Font?myFont?=?new?Font("MV?Boli",Font.BOLD,40); this.setFont(myFont); this.setForeground(Color.WHITE); this.setFocusPainted(false); super.paintComponent(g); } public?void?paintBorder(Graphics?g){ // super.paintBorder(g); Graphics2D?g2?=?(Graphics2D)?g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,?RenderingHints.VALUE_ANTIALIAS_ON); g.setColor(Color.gray); g.drawOval(0,?0,?super.getWidth()?,?super.getHeight()); } @Override public?void?mouseClicked(MouseEvent?e)?{ //?TODO?Auto-generated?method?stub // this.setBackground(Color.white); } @Override public?void?mousePressed(MouseEvent?e)?{ //?TODO?Auto-generated?method?stub this.setBackground(new?Color(65,?201,?252,?200)); } @Override public?void?mouseReleased(MouseEvent?e)?{ //?TODO?Auto-generated?method?stub this.setBackground(new?Color(65,?201,?252,?50)); } @Override public?void?mouseEntered(MouseEvent?e)?{ //?TODO?Auto-generated?method?stub this.setBackground(new?Color(65,?201,?252,?150)); } @Override public?void?mouseExited(MouseEvent?e)?{ //?TODO?Auto-generated?method?stub this.setBackground(new?Color(65,?201,?252,?50)); } }