关于jTextField的值

Question

LoagBegintime是一个jTextField，我想让他的值是当前日期和时间Calendar getToday = Calendar.getInstance();
LoadBegintime.setToolTipText(DateFormat.getDateTimeInstance(2, 2).formatgetToday).toString());出现了这堆错误，请问有什么办法做到我想要得功能
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Cannot format given Object as a Date at java.text.DateFormat.format(DateFormat.java:279) at java.text.Format.format(Format.java:133) at netbar.NetBarFrame.Loads_actionPerformed(NetBarFrame.java:201) at netbar.NetBarFrame_Loads_actionAdapter.actionPerformed(NetBarFrame.java:241) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258) at javax.swing.AbstractButton.doClick(AbstractButton.java:302) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041) at java.awt.Component.processMouseEvent(Component.java:5488) at javax.swing.JComponent.processMouseEvent(JComponent.java:3093) at java.awt.Component.processEvent(Component.java:5253) at java.awt.Container.processEvent(Container.java:1966) at java.awt.Component.dispatchEventImpl(Component.java:3955) at java.awt.Container.dispatchEventImpl(Container.java:2024) at java.awt.Component.dispatchEvent(Component.java:3803) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822) at java.awt.Container.dispatchEventImpl(Container.java:2010) at java.awt.Window.dispatchEventImpl(Window.java:1766) at java.awt.Component.dispatchEvent(Component.java:3803) at java.awt.EventQueue.dispatchEvent(EventQueue.java:463) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Answer 1

SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss);String s = sf.format(getToday);LoadBegintime.setToolTipText(s);

Answer 2

jTextField是否要设置某些属性才可以？

Answer 3

也一样的错误，现在连新工程的setText全部都用不了

Answer 4

只要不导入import java.text.SimpleDateFormat;就没事

Answer 5

不知道，凡是import java.text就会有问题，我也想知道