Java 如何调整JButton的大小以适应图标

发布于11月08日

我试图制作我的大学网站的用户界面，但我遇到了一个问题，按钮周围有一个奇怪的边框

现在看起来是这样的:

它应该是这样的:

public static void middleBar(JFrame frame){
        JPanel middle = new JPanel();
        middle.setLayout(new GridLayout(4,6,20,20));
        String[] items = {"UniversityERP","Award","Blackboard","CCT","CertificateIssuance","CourseEvaluationSurvey","DoctoralPortal",
        "Fastrack","HostelManagement","IDCardManagement","MobileAppCMS","OnCampusJob","StudentOutboundMobility","StudentAttendanceRecording","StudentAttendanceManagement",
        "StudentClearance","StudentPaymentCenter"};
        for(String item:items){
            ImageIcon icon = new ImageIcon("Images/"+item+".png");
            JButton button = new JButton(icon);
            Dimension d = new Dimension(icon.getIconWidth(),icon.getIconHeight());
            button.setPreferredSize(d);
            middle.add(button);
        }
        JPanel middleBar = new JPanel(new BorderLayout());
        middleBar.add(middle,BorderLayout.NORTH);
        frame.add(middleBar,BorderLayout.CENTER);
    }

我怎么把它移走？

我try 使用setPferedSize方法，但不起作用

java.awt.Insets.Insets(int top, int left, int bottom, int right) Creates and initializes a new Insets object with the specified top, left, bottom, and right insets. Parameters: top - the inset from the top. left - the inset from the left. bottom - the inset from the bottom. right - the inset from the right.