JLabel没有居中

时间:2017-03-18 20:27:13

标签: java swing jlabel

所以我一直在研究一个java程序,我试图让JLabel居中在窗口中间,但是我做的标签只是在顶部中心。我希望有人可以帮助找到一种方法让文本居中在窗口中间。这是我的代码:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;

public class Lottery extends JPanel implements ActionListener {


    private static final long serialVersionUID = 5815877011755522230L;

    private JLabel label;

    public static void main(String[] args) {    
        make();

    }

    public Lottery() {

        label = new JLabel("Hello There");
        label.setHorizontalAlignment(JLabel.CENTER);
        label.setVerticalAlignment(JLabel.CENTER); 
        add(label);

    }

    public static void make(){
        JFrame frame = new JFrame("Lottery");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Lottery hi = new Lottery();
        frame.setContentPane(hi);

        frame.setSize(600, 600);
        frame.setVisible(true);

    }


}

有人可以帮我解决这个问题。

1 个答案:

答案 0 :(得分:2)

替换add(标签);用:

setLayout(new BorderLayout());
add(label, BorderLayout.CENTER);

并且不要忘记导入java.awt.BorderLayout;

您的代码会对齐标签中的文字,但标签本身并不在您的面板中居中。无论如何,你必须修改布局。

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;

import java.awt.BorderLayout;

public class Lottery extends JPanel {


    private static final long serialVersionUID = 5815877011755522230L;

    private JLabel label;

    public static void main(String[] args) {
        make();

    }

    public Lottery() {

        label = new JLabel("Hello There");
        label.setHorizontalAlignment(JLabel.CENTER);
        label.setVerticalAlignment(JLabel.CENTER);
        //add(label);
        setLayout(new BorderLayout());
        add(label, BorderLayout.CENTER);

    }

    public static void make(){
        JFrame frame = new JFrame("Lottery");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Lottery hi = new Lottery();
        frame.setContentPane(hi);

        frame.setSize(600, 600);
        frame.setVisible(true);

    }


}

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