JTabbedPane里怎么得到某个TabbedPane里的值啊

Question

既然是if(tagtab==2)，那么应该是Test2
Test1 t1=(Test1)tabbed.getComponentAt(0);//运行时，这里报错
-->
Test2 t2=(Test2)tabbed.getComponentAt(0);

Answer 1

可我要获得Test1里的aaaa的值，应该怎么得呢
Test1 t1=(Test1)tabbed.getComponentAt(1);//改成1，2都还是报错啊

Answer 2

将条件改改
 if(tagtab==2)
-->
 if(tagtab==1)

Answer 3

还是报错！
而且我是想点击Test3时，激活事件，获得此时Test1,Test2里相应得变量值

Answer 4

把t1、t2、t3声明为final static的

Answer 5

if(tagtab==2)
    {
      Test1 t1=(Test1)tabbed.getComponentAt(0);//运行时，这里报错
      int aa=tabbed.getComponentCount();
      System.out.println("aa "+t1.aaaa);//Test1里有变量public int aaaa=3;
    }
-->
    if(tagtab==2)
    {
    Test1 t1=null;
    for(int i=0;i<tabbed.getComponentCount();i++) {
      if(tabbed.getComponentAt(i) instanceof Test1) {//判断是否Test1的实例
        t1=(Test1)tabbed.getComponentAt(0);
        break;
      }
    }
      int aa=tabbed.getComponentCount();
      System.out.println("aa "+t1.aaaa);//Test1里有变量public int aaaa=3;
    }

Answer 6

还是报错，是创建Test1,2,3是声明为final类
还是在初始化时用final啊，两个我都试了，还是一样报错
java.lang.ClassCastException
at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:287) at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:219) at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:116) at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:50) at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:468) at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:461) at javax.swing.plaf.basic.BasicTabbedPaneUI$MouseHandler.mousePressed(BasicTabbedPaneUI.java:3051)

Answer 7

sorry，上面:
t1=(Test1)tabbed.getComponentAt(0);
-->
t1=(Test1)tabbed.getComponentAt(i);

Answer 8

回复老超时，faint everywhere