时间:2023-03-21 09:47:54 | 栏目:JAVA代码 | 点击:次
1. 流式布局(FlowLayout)
定义:
通俗地说,流式布局就是根据窗口大小,自动改变窗口内组件的位置。例如:原窗口大小一行可以容纳10个BUTTON,但将窗口缩小后,每行仅能容纳5个BUTTON,此时原先的10个BUTTON中的五个就会自动排列到下一行。
示例:(省略panel的使用)
Hashset
package 布局管理; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class Layout { //流式布局 public static void main(String[] args) { Frame frame = new Frame(); //创建一个窗口 frame.setLayout(new FlowLayout(FlowLayout.LEFT)); //将窗口布局设置为流式布局,并设置向左对齐 Button button1 = new Button("button1"); //创建若干个按钮 Button button2 = new Button("button2"); Button button3 = new Button("button3"); Button button4 = new Button("button4"); Button button5 = new Button("button5"); frame.add(button1); //将按钮添加进窗口中 frame.add(button2); frame.add(button3); frame.add(button4); frame.add(button5); frame.setBounds(200,200,500,500); //设置窗口的位置与大小 frame.setVisible(true); //设置窗口可见性 frame.addWindowListener(new WindowAdapter() { //事件监听:关闭窗口 @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } }
2. 东西南北中布局(BorderLayout)
定义:
东西南北中布局,顾名思义。将窗口分为东西南北中四个“块儿”,也可以称作上下左右中布局,便于理解。
示例:(省略panel的使用)
package 布局管理; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class BorderLayout { //东西南北中布局 public static void main(String[] args) { Frame frame = new Frame(); frame.setLayout(new java.awt.BorderLayout()); Button east = new Button("East"); east.setBackground(new Color(140, 172, 51)); Button west = new Button("West"); west.setBackground(new Color(140, 172, 51)); Button north = new Button("North"); north.setBackground(new Color(38, 222, 135)); Button south = new Button("South"); south.setBackground(new Color(38, 222, 135)); Button center = new Button("Center"); frame.add(east, java.awt.BorderLayout.EAST); frame.add(west, java.awt.BorderLayout.WEST); frame.add(north, java.awt.BorderLayout.NORTH); frame.add(south, java.awt.BorderLayout.SOUTH); frame.add(center, java.awt.BorderLayout.CENTER); frame.setBounds(200,200,500,500); frame.setVisible(true); frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } }
3. 表格式布局
定义:
将窗口拆分为若干个表格(拆分为自己需要的表格),再往里添加组件。
示例:
GUI经常使用的“登录”、“注册”界面
package 布局管理; import javafx.scene.control.PasswordField; import javafx.scene.layout.Pane; import sun.security.util.Password; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.nio.charset.Charset; public class GridLayout { public static void main(String[] args) { // System.out.println("file.encoding=" + System.getProperties().getProperty("file.encoding")); // System.out.println("默认是:"+ Charset.defaultCharset().name()); Frame frame = new Frame("表格布局"); frame.setLayout(new java.awt.GridLayout(4,1)); //设置行列数 Panel panel1 = new Panel(); frame.add(panel1); Panel panel2 = new Panel(); frame.add(panel2); Panel panel3 = new Panel(); frame.add(panel3); Panel panel4 = new Panel(); frame.add(panel4); Label label = new Label("welcome to *** system"); label.setFont(new Font("宋体", Font.PLAIN, 26)); Label label1 = new Label("Account: "); TextField textField = new TextField(); textField.setColumns(20); Label label2 = new Label("Password: "); TextField textField1 = new TextField(); //AWT没有passwordField textField1.setColumns(20); textField1.setEchoChar('*'); Button button = new Button("Login"); panel1.add(label); panel2.add(label1); panel2.add(textField); panel3.add(label2); panel3.add(textField1); panel4.add(button); frame.setBounds(200,200,500,250); frame.setVisible(true); frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } }
4. 我不要布局!!!
当设置 frame.setLayout(null) ;时,可以使用给panel设置坐标的方式控制布局,更具灵活性!
package AWT; import javafx.scene.layout.Pane; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.event.WindowListener; public class panel { public static void main(String[] args) { Frame frame = new Frame(); //new一个窗口出来 Panel panel = new Panel(); //new一个面板 Panel panel1 = new Panel(); //new一个面板 Panel panel2 = new Panel(); //new一个面板 frame.setLayout(null); //设置布局为空 frame.setBounds(200,200,500,500); //设置窗口位置大小 panel.setBounds(20,15,460,50); //设置第一个面板 panel.setBackground(new Color(253, 228,1)); //设置面板颜色 panel1.setBounds(20,70,100,415); panel1.setBackground(new Color(0, 71, 254)); panel2.setBounds(130,70,350,415); panel2.setBackground(new Color(1,1,1)); frame.add(panel); //面板加入到窗口中 frame.add(panel1); frame.add(panel2); frame.setVisible(true); frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); { } } }
5. 我都要!!!
为了使界面更加美观,可以使用多种布局的嵌套哦!