Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

错误提示

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at TalkClientFace$1.actionPerformed(TalkClient.java:144)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

错误代码如下：

search.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					Infos.clear();
					boolean [] state = {check1.isSelected(),check2.isSelected(),check3.isSelected(),check4.isSelected(),check5.isSelected()};
					try {
						int n;
						n = mydata.bytime(building.getSelectedIndex(), day.getSelectedIndex()+1, state, Infos);
						System.out.println("add driver successful");
						if(n == 0)  JOptionPane.showMessageDialog(null,"没有找到符合要求的自习室","没有找到",JOptionPane.WARNING_MESSAGE);
						else JOptionPane.showMessageDialog(null,"找到"+n+"个符合要求的自习室","查找结果",JOptionPane.INFORMATION_MESSAGE);
					} catch (SQLException e1) {
						// TODO 自动生成 catch 块
						e1.printStackTrace();
					}
					//System.out.println(Infos);
					 table.updateUI();

				}
			});

求高手帮一下忙

6 个解决方案

#1

可能问题出在                    
boolean [] state = {check1.isSelected(),check2.isSelected(),check3.isSelected(),check4.isSelected(),check5.isSelected()};

NullPointerException一般都是array搞出来的。

#2

14Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at TalkClientFace$1.actionPerformed(TalkClient.java:144)
144是哪一行，楼主。

#3

引用 2 楼 still_rain 的回复:

14Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at TalkClientFace$1.actionPerformed(TalkClient.java:144)
144是哪一行，楼主。

是这一行
n = mydata.bytime(building.getSelectedIndex(), day.getSelectedIndex()+1, state, Infos);

#4

引用 1 楼 coldanimal 的回复:

可能问题出在  
boolean [] state = {check1.isSelected(),check2.isSelected(),check3.isSelected(),check4.isSelected(),check5.isSelected()};

NullPointerException一般都是array搞出来的。

能具体说一下吗

#5

你看看bytime方法是不是要一个空的Infos对象做参数
你之前调用了Infos.clear();

#6

引用 5 楼 diandimei 的回复:

你看看bytime方法是不是要一个空的Infos对象做参数
你之前调用了Infos.clear();

是要一个空的Infos对象做参数