创建JTabbedPane
并得到11的制表符数 之后的逻辑有什么问题,然后使用setter?引用JTabbedPane的属性时出现NullPointerException
我尝试引用SetObjects.currentJTabbedPane
的tabCount
,它会抛出 NullPointerException
。
创建
jtp.setSelectedIndex(0);
int jtpCount=jtp.getTabCount();
System.out.println(C+M+AND+jtpCount+": jtpCount of The JTabbedPane created: \n");
setCurrentJTabbedPane(jtp);
int currentCount=SetObjects.currentJTabbedPane.getTabCount();
System.out.println(C+M+AND+currentCount+": currentCount for
SetObjects.currentJTabbedPane.getTabCount() : \n");
设定器
public static void setCurrentJTabbedPane(JTabbedPane currentJTabbedPane) {
String M =(" --> in setCurrentJTabbedPane() var: <-- \n");
System.out.println(M);
SetObjects.currentJTabbedPane = currentJTabbedPane;
System.out.println(C+M+AND+SetObjects.currentJTabbedPane.getTabCount()+":
SetObjects.currentJTabbedPane.getTabCount() : \n");
}
输出
CLASS
濑bjects:
- > JTabbedPane的OBJ()VAR:XXXXXXXXX:XXXXXXXX < -
:11:JTabbedPane中的jtpCount创建:--> in setCurrentJTabbedPane() var: <--
异常在线程 “主” 显示java.lang.NullPointerException
在view.SetObjects.setCurrentJTabbedPane(SetObjects.java:385)
在view.SetObjects.obj(SetObjects.java:217)
在view.SchoolJDesktopPane.createInnerFrame(SchoolJDesktopPane.java:119)
在view.SchoolJDesktopPane。 (SchoolJDesktopPane.java:97 )
在view.Main.createJDesktopPane(Main.java:60)
在view.Main.main(Main.java:54)
你在** create **中初始化'currentJTabbedPane'的位置? – Ishtar 2010-10-29 01:39:44
我看到你已经更新了你的帖子,你现在传递'jtp'到setCurrentJTabbedPane。你刚解决了你的问题吗? – 2010-10-29 01:44:47