java Swing GUI 入门-图片和控件可视化

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加入一张图片

一个Imagelabel 设置居中,命名为logoLabel,Custom Create 打勾.

注意要保持图片的尺寸,要不然太大了把其他的内容都遮住了

private void createUIComponents() {

logoLabel = new JLabel();

ImageIcon logoIcon = new ImageIcon(new ImageIcon("image/a.png").getImage().getScaledInstance(300, 250, Image.SCALE_SMOOTH));

logoLabel.setIcon(logoIcon);

}

控件可视化

通过设置Panel的setVisible属性可以控制一个控件是否可见

panel1.setVisible(false);

panel2.setVisible(false);

panel3.setVisible(false);

panel4.setVisible(false);

panel5.setVisible(false);

Jframe 初始大小

在主函数main函数中可以设置窗口的初始大小

frame.setPreferredSize(new Dimension(800, 800));

程序演示

完整代码

import javax.swing.*;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class GolfTourneyManager {

private JPanel mainPanel;

private JPanel panel1;

private JPanel panel2;

private JPanel panel3;

private JPanel panel4;

private JPanel panel5;

private JTextField textField1;

private JCheckBox professionalCheckBox;

private JRadioButton sandpiperRadioButton;

private JRadioButton mayfairRadioButton;

private JRadioButton blackHawkRadioButton;

private JRadioButton theRanchRadioButton;

private JTextField feeField;

private JButton REGISTERButton;

private JSlider slider1;

private JLabel handiLabel;

private JLabel logoLabel;

private JButton registerNowButton;

private JPanel TitleBarPanel;

public GolfTourneyManager() {

professionalCheckBox.addChangeListener(new ChangeListener() {

@Override

public void stateChanged(ChangeEvent e) {

if (professionalCheckBox.isSelected()) {

feeField.setText("$120");

} else {

feeField.setText("$100");

}

}

});

slider1.addChangeListener(new ChangeListener() {

@Override

public void stateChanged(ChangeEvent e) {

int handicap = slider1.getValue();

handiLabel.setText("Your Handicap: " + handicap);

}

});

registerNowButton.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

panel1.setVisible(true);

panel2.setVisible(true);

panel3.setVisible(true);

panel4.setVisible(true);

panel5.setVisible(true);

}

});

panel1.setVisible(false);

panel2.setVisible(false);

panel3.setVisible(false);

panel4.setVisible(false);

panel5.setVisible(false);

}//end constructor

public static void main(String[] args) {

JFrame frame = new JFrame("Golf Tourney Manager");

frame.setContentPane(new GolfTourneyManager().mainPanel);

frame.setPreferredSize(new Dimension(800, 800));

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.pack();

frame.setVisible(true);

}

private void createUIComponents() {

logoLabel = new JLabel();

ImageIcon logoIcon = new ImageIcon(new ImageIcon("image/a.png").getImage().getScaledInstance(300, 250, Image.SCALE_SMOOTH));

logoLabel.setIcon(logoIcon);

}

}//end class

原文：https://www.cnblogs.com/cloud-ken/p/14169828.html