jpanel和jlabel在worldwind上面为什么不是透明的？

登山看云海 2017-03-13 04:54:50

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我已经在我的JFrame对象上添加了JLabel。我想在JLabel上实现一个关键侦听器。我可以实施吗？如果是，我该怎么做？

//布局组件 JPanel panel_1 = new JPanel(new GridLayout(3,1)); JPanel panel = new JPanel(new GridLayout(2,1)); JLabel label_2 = new JLabel(); JLabel label_1 = new JLabel("请选择要保存到的目录:"); JPanel panel_5 = new JPanel(); JPanel panel_4 = new JPanel(new FlowLayout(FlowLayout.CENTER)); JPanel panel_2 = new JPanel(); JPanel panel_3 = new JPanel(); JLabel label = new JLabel("文件夹：");

ublic class JCalendar extends JPanel{ //动态表示年月日 private int year=0; private int month=0; private int day=0; private int first = 0; //用于标志日历面板是否显示 private static boolean isShow = false; //主面板 private JPanel Main = new JPanel(); //日面板 private JPanel jPanelDay = new JPanel(); //月面板 private JPanel jPanelMonth = new JPanel(); //月的输入位置 private JTextField Month = new JTextField(); //减少月份 private JButton MonthDown = new JButton(); //增加月份 private JButton MonthUp = new JButton(); private JPanel jPanelButton = new JPanel(); //减少年份 private JButton YearDown = new JButton(); //增加年份 private JButton YearUp = new JButton(); //显示日期的位置 private JLabel Out = new JLabel(); public JLabel Out2 = new JLabel(); private Locale l=Locale.CHINESE; //主日历 private GregorianCalendar cal=new GregorianCalendar(l); //星期面板 private JPanel weekPanel=new JPanel(); //天按钮组 private JToggleButton[] days=new JToggleButton[42]; //天面板 private JPanel Days = new JPanel(); //标示 private JLabel jLabel1 = new JLabel(); private JLabel jLabel2 = new JLabel(); private JLabel jLabel3 = new JLabel(); private JLabel jLabel4 = new JLabel(); private JLabel jLabel5 = new JLabel(); private JLabel jLabel6 = new JLabel(); private JLabel jLabel7 = new JLabel(); //当前选择的天数按钮 private JToggleButton cur=null; //月份天数数组，用来取得当月有多少天 // 1 2 3 4 5 6 7 8 9 10 11 12 private int[] mm={31,28,31,30,31,30,31,31,30,31,30,31}; //空日期构造函数 public JCalendar() { try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } //带日期设置的构造函数 public JCalendar(int year, int month, int day) { cal.set(year, month, day); try { jbInit(); } catch (Exception e) { e.printStackTrace(); }

新作很好完的java手机小游import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; class happy extends JFrame implements ActionListener { JPanel p1=new JPanel(); JPanel p2=new JPanel(); JLabel lab1=new JLabel("黑色"); JLabel lab2=new JLabel("黄色"); JTextField txt1 =new JTextField(); JTextField txt2 =new JTextField(); JButton btn[]=new JButton[25]; JLabel lab3=new JLabel("重新开始");

简单的Java万年历 public class Hours implements Runnable { JFrame f = new JFrame(); JPanel p = new JPanel(); JLabel JL_1 = new JLabel(); JLabel JL_1_1 = new JLabel(); JLabel JL_2 = new JLabel(); JLabel JL_2_1 = new JLabel("年"); JLabel JL_2_2 = new JLabel("月"); JLabel JL_2_3 = new JLabel("从"); JLabel JL_2_4 = new JLabel("到"); // JLabel JL_2_5 = new JLabel("某日"); JTextField JT_1 = new JTextField(5); JTextField JT_2 = new JTextField(5); JTextField JT_3 = new JTextField(5); JTextField JT_4 = new JTextField(5); JTextField JT_5 = new JTextField(5); JTextField JT_6 = new JTextField(5); JTextField JT_7 = new JTextField(5); JTextField JT_8 = new JTextField(5); JButton B_1 = new JButton("查询"); JButton B_2 = new JButton("查询"); JButton B_3 = new JButton("重填"); JPanel Jp = new JPanel(new GridLayout(7, 7)); JPanel p2 = new JPanel(); JLabel[] label = new JLabel[49]; JLabel JL1 = new JLabel("倒计时"); JLabel JL2 = new JLabel(""); JTextField JT = new JTextField(10); JLabel JL3 = new JLabel("天"); Font F_1 = new Font("楷体", Font.PLAIN, 18); Font F_2 = new Font("华文行楷", Font.PLAIN, 30); Font F_3 = new Font("华文行楷", Font.PLAIN, 30); Font F_4 = new Font("微软细雅", Font.PLAIN, 65); Font F_5 = new Font("楷体", Font.PLAIN, 20);

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