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分享public class Test4 extends JFrame{
Test4(){
JTextField text1 = new JTextField();
JTextField text2 = new JTextField();
this.add(text1, BorderLayout.NORTH);
this.add(text2, BorderLayout.SOUTH);
boolean b = text2.requestFocusInWindow(); //关键是这里
System.out.println(b);
}
public static void main(String[] args){
Test4 test4 = new Test4();
test4.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Dimension size = new Dimension(300, 200);
test4.setSize(size);
test4.setPreferredSize(size);
test4.setMaximumSize(size);
test4.setMinimumSize(size);
test4.setVisible(true);
}
}
addComponentListener(new ComponentAdapter () {
public void componentShown(ComponentEvent e) {
boolean b = text2.requestFocusInWindow();
System.out.println(b);
}
});