package com.akita.lesson03;import javax.swing.*;import java.awt.*;public class JframeDemo02 { public static void main(String[] args) { new MyJframe02().init(); }}class MyJframe02 extends Jframe { public void init() { this.setBounds(200, 200, 500, 500); //获得一个容器，只有这样设置颜色才会生效 Container contentPane = this.getContentPane(); contentPane.setBackground(Color.CYAN); //设置文字 JLabel jLabel = new JLabel("akita"); this.add(jLabel); //让文本标签居中 jLabel.setHorizontalAlignment(SwingConstants.CENTER); setVisible(true); }}
弹窗package com.akita.lesson03;import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;//主窗口public class DialogDemo extends Jframe { public DialogDemo() { this.setSize(500, 350); this.setLocation(300, 300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //Jframe 放东西容器 Container contentPane = this.getContentPane(); //绝对布局 contentPane.setLayout(null); //按钮 JButton jButton = new JButton("点击弹出对话框"); jButton.setBounds(30, 30, 200, 50); //点击这个按钮弹出一个弹窗 jButton.addActionListener(new ActionListener() { //监听器 @Override public void actionPerformed(ActionEvent e) { //弹窗 new MyDialogDD(); } }); contentPane.add(jButton); this.setVisible(true); } public static void main(String[] args) { new DialogDemo(); }}//弹窗的窗口class MyDialogDD extends JDialog { public MyDialogDD() { this.setBounds(100, 100, 500, 500); Container contentPane = this.getContentPane(); contentPane.setLayout(null); Label akita = new Label("akita"); akita.setSize(50, 50); contentPane.add(akita); this.setVisible(true); }}
标签 JLabelJLabel jLabel = new JLabel("标签");
Icon
package com.akita.lesson03;import javax.swing.*;import java.awt.*;//图标是一个接口，需要实现类，并继承Jframepublic class IconDemo extends Jframe implements Icon { private int width; private int height; public IconDemo() { } public IconDemo(int width, int height) { this.width = width; this.height = height; } public void init() { IconDemo iconDemo = new IconDemo(15, 15); //图标要放在标签上 JLabel jLabel = new JLabel("icon_test", iconDemo, SwingConstants.CENTER); Container contentPane = getContentPane(); contentPane.add(jLabel); this.setBounds(200,200,400,340); this.setVisible(true); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new IconDemo().init(); } @Override public void paintIcon(Component c, Graphics g, int x, int y) { g.fillOval(x, y, width, height); } @Override public int getIconWidth() { return this.width; } @Override public int getIconHeight() { return this.height; }}
ImageIconpackage com.akita.lesson03;import javax.swing.*;import java.awt.*;import java.net.URL;public class ImageIconDemo extends Jframe { public ImageIconDemo() { JLabel akita = new JLabel("akita"); //获取图片地址 URL url = ImageIconDemo.class.getResource("icon.png"); ImageIcon imageIcon = new ImageIcon(url); akita.setIcon(imageIcon); akita.setHorizontalAlignment(SwingConstants.CENTER); Container container = getContentPane(); container.add(akita); setVisible(true); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setBounds(200, 200, 500, 500); } public static void main(String[] args) { new ImageIconDemo(); }}
面板 JPanelpackage com.akita.lesson04;import com.akita.lesson03.JframeDemo;import javax.swing.*;import java.awt.*;public class JPanelDemo extends Jframe { public JPanelDemo() { this.setBounds(100, 100, 400, 400); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); Container container = this.getContentPane(); container.setLayout(new GridLayout(2, 2, 10, 10)); JPanel jPanel1 = new JPanel(new GridLayout(1, 3)); JPanel jPanel2 = new JPanel(new GridLayout(1, 2)); JPanel jPanel3 = new JPanel(new GridLayout(2, 1)); JPanel jPanel4 = new JPanel(new GridLayout(3, 2)); jPanel1.add(new JButton("1")); jPanel1.add(new JButton("1")); jPanel1.add(new JButton("1")); jPanel2.add(new JButton("2")); jPanel2.add(new JButton("2")); jPanel3.add(new JButton("3")); jPanel3.add(new JButton("3")); jPanel4.add(new JButton("4")); jPanel4.add(new JButton("4")); jPanel4.add(new JButton("4")); jPanel4.add(new JButton("4")); jPanel4.add(new JButton("4")); jPanel4.add(new JButton("4")); container.add(jPanel1); container.add(jPanel2); container.add(jPanel3); container.add(jPanel4); this.setVisible(true); } public static void main(String[] args) { new JPanelDemo(); }}
运行结果
package com.akita.lesson04;import javax.swing.*;import java.awt.*;public class JScrollDemo extends Jframe { public JScrollDemo() { Container contentPane = this.getContentPane(); //文本域 Jtextarea jtextarea = new Jtextarea(20, 50); jtextarea.setText("akita"); //Scroll面板 JScrollPane jScrollPane = new JScrollPane(jtextarea); jScrollPane.setBackground(new Color(1, 1, 1)); contentPane.add(jScrollPane); this.setVisible(true); this.setBounds(100, 100, 300, 300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JScrollDemo(); }}
运行效果
package com.akita.lesson04;import javax.swing.*;import java.awt.*;import java.net.URL;public class JButtonDemo01 extends Jframe { public JButtonDemo01() { Container container = this.getContentPane(); //把图片转化成图标 URL url = JButtonDemo01.class.getResource("icon.png"); ImageIcon icon = new ImageIcon(url); //把这个图标放置在按钮上 JButton jButton = new JButton(); jButton.setIcon(icon); jButton.setToolTipText("akita"); //add container.add(jButton); setVisible(true); setBounds(100, 100, 200, 200); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JButtonDemo01(); }}
运行效果
package com.akita.lesson04;import javax.swing.*;import java.awt.*;public class JButtonDemo02 extends Jframe { public JButtonDemo02() { Container container = this.getContentPane(); //单选框 JRadioButton radioButton1 = new JRadioButton("radioButton1"); JRadioButton radioButton2 = new JRadioButton("radioButton2"); JRadioButton radioButton3 = new JRadioButton("radioButton3"); //由于单选框只能选择一个，所以我们通常对他们进行分组 ButtonGroup buttonGroup = new ButtonGroup(); buttonGroup.add(radioButton1); buttonGroup.add(radioButton2); buttonGroup.add(radioButton3); //add container.add(radioButton1, BorderLayout.CENTER); container.add(radioButton2, BorderLayout.NORTH); container.add(radioButton3, BorderLayout.SOUTH); this.setVisible(true); this.setBounds(200, 200, 500, 350); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JButtonDemo02(); }}
运行效果
package com.akita.lesson04;import javax.swing.*;import java.awt.*;public class JButtonDemo03 extends Jframe { public JButtonDemo03() { Container container = this.getContentPane(); //多选框 JCheckBox jCheckBox1 = new JCheckBox("jCheckBox1"); JCheckBox jCheckBox2 = new JCheckBox("jCheckBox2"); container.add(jCheckBox1, BorderLayout.NORTH); container.add(jCheckBox2, BorderLayout.SOUTH); this.setVisible(true); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); this.setBounds(200, 200, 400, 250); } public static void main(String[] args) { new JButtonDemo03(); }}
运行效果