mouseenterfocusmover.java

The Definitive Guide to Java Swing, Third Edition by John Zukowski (Author) 源码

import java.awt.*;
import java.awt.event.*;
public class MouseEnterFocusMover extends MouseAdapter {
  public void mouseEntered(MouseEvent mouseEvent) {
    Component component = mouseEvent.getComponent();
    if (!component.hasFocus()) {
      component.requestFocusInWindow();
    }
  }
}