KeyboardFocusManager.getCurrentKeyboardFocusManager().getDefaultFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS) : 焦点 « Swing事件 « Java 教程

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Java 教程 » Swing事件 » 焦点

15. 15. 24. KeyboardFocusManager.getCurrentKeyboardFocusManager().getDefaultFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS)


import java.awt.AWTKeyStroke;

import java.awt.KeyboardFocusManager;

import java.util.HashSet;

import java.util.Set;



import javax.swing.KeyStroke;



public class Main {

  public static void main(String[] argv) throws Exception {

    Set<AWTKeyStroke> set = new HashSet<AWTKeyStroke>(KeyboardFocusManager

        .getCurrentKeyboardFocusManager().getDefaultFocusTraversalKeys(

            KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS));



    set.add(KeyStroke.getKeyStroke("F3"));

    KeyboardFocusManager.getCurrentKeyboardFocusManager().setDefaultFocusTraversalKeys(

        KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, set);



  }

}

15. 15. 焦点
	15. 15. 1.	无焦点按钮
	15. 15. 2.	焦点自动设置
	15. 15. 3.	焦点遍历：requestFocusInWindow
	15. 15. 4.	移动焦点到下一个组件：focusNextComponent ( )
	15. 15. 5.	焦点循环限制
	15. 15. 6.	窗口焦点
	15. 15. 7.	预定义的焦点遍历政策
	15. 15. 8.	扭转焦点遍历
	15. 15. 9.	KeyboardFocusManager
	15. 15. 10.	使用KeyboardFocusManager
	15. 15. 11.	使用FocusTraversalPolicy
	15. 15. 12.	寻找下一焦点组件
	15. 15. 13.	查找以前焦点组件
	15. 15. 14.	确定是否丢失焦点
	15. 15. 15.	Null is returned if none of the components in this application has the focus
	15. 15. 16.	Null is returned if none of the windows in this application has the focus
	15. 15. 17.	Changes the focus traversal keys for the entire application.
	15. 15. 18.	Change the backward focus traversal keys for the application
	15. 15. 19.	改变焦点遍历
	15. 15. 20.	JComponent.setFocusTraversalKeys(int arg0, Set arg1)
	15. 15. 21.	KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS
	15. 15. 22.	设置焦点遍历
	15. 15. 23.	KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS
	15. 15. 24.	KeyboardFocusManager.getCurrentKeyboardFocusManager().getDefaultFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS)
	15. 15. 25.	KeyboardFocusManager.getCurrentKeyboardFocusManager().clearGlobalFocusOwner()
	15. 15. 26.	确定焦点事件
	15. 15. 27.	Listening to All Key Events Before Delivery to Focused Component
	15. 15. 28.	消除焦点
	15. 15. 29.	Use isFocusOwner to determine whether a particular component has the focus
	15. 15. 30.	JComponent.WHEN_IN_FOCUSED_WINDOW
	15. 15. 31.	Make sure that my Text field has the focus when a JFrame is created

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