import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class TestText extends JFrame implements FocusListener {

    private JTextField[] txts = new JTextField[3];

    public TestText() {
        getContentPane().setLayout(new FlowLayout());

        for (int i = 0; i < txts.length; i++) {
            txts[i] = new JTextField("Test" + i);
            txts[i].setName("我是Text：" + i);
            txts[i].setPreferredSize(new Dimension(70, 20));
            txts[i].addFocusListener(this);

            getContentPane().add(txts[i]);
        }

        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(300, 200);
    }

    public void focusGained(FocusEvent e) {
        System.out.println(((JComponent) e.getSource()).getName());
    }

    public void focusLost(FocusEvent e) {

    }

    public static void main(String[] args) {
        TestText frame = new TestText();
        frame.setVisible(true);
    }
}

------解决方案--------------------
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Java codeimport java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class TestText extends JFrame implements FocusListener {

    private JTextField[] txts = new JTextField[3];

    public TestText() {
        getConten…