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【第18章：图形界面】_布局管理器

发布时间：2021-01-16 10:36:18编辑：雪饮阅读（）

 流式布局管理器

import java.awt.FlowLayout ;
import javax.swing.JFrame ;
import javax.swing.JButton ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To kasumi") ;
              //水平居中 3行3列显示，则默认没有拉伸情况下以3行3列显示，那么这9个容器的所占用总空间在frame中相对于frame是水平居中的
              frame.setLayout(new FlowLayout(FlowLayout.CENTER,3,3)) ;
              for(int i=0;i<9;i++){
                     JButton but = new JButton("按钮-"+ i) ;
                     frame.add(but) ;
              }
              frame.setSize(280,123) ;
              frame.setVisible(true) ;
       }
}

边界布局管理器
import java.awt.BorderLayout ;
import javax.swing.JFrame ;
import javax.swing.JButton ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To kasumi") ;
              //3行3列
              frame.setLayout(new BorderLayout(3,3)) ;
              //东
              frame.add(new JButton("kasumi"),BorderLayout.EAST) ;
              //南
              frame.add(new JButton("anyane"),BorderLayout.SOUTH) ;
              //中
              frame.add(new JButton("snowDrink"),BorderLayout.CENTER) ;
              //西
              frame.add(new JButton("momiji"),BorderLayout.WEST);
              //北
              frame.add(new JButton("lisa"),BorderLayout.NORTH) ;
             
              frame.setSize(280,123) ;
              frame.setVisible(true) ;
       }
}

网格布局管理器
import java.awt.GridLayout ;
import javax.swing.JFrame ;
import javax.swing.JButton ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To kasumi") ;
              //行、列、水平间距、垂直间距
              frame.setLayout(new GridLayout(3,5,3,13)) ;
              JButton but = null ;
              for(int i=0;i<15;i++){
                     but = new JButton("按钮-"+ i) ;
                     frame.add(but) ;
              }
              //根据组件自动适配窗体大小
              frame.pack() ;
              frame.setVisible(true) ;
       }
}

卡片布局管理器
类似于一副扑克牌，然后每次只显示最顶上那一张
import java.awt.CardLayout ;
import java.awt.Container ;
import javax.swing.JFrame ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
                     JFrame frame = new JFrame("Welcome To kasumi") ;
              CardLayout card = new CardLayout() ;
              frame.setLayout(card) ;
              Container con = frame.getContentPane() ;
              con.add(new JLabel("kasumi",JLabel.CENTER),"first") ;
              con.add(new JLabel("ayane",JLabel.CENTER),"second") ;
              con.add(new JLabel("snowDrink",JLabel.CENTER),"thrid") ;
              con.add(new JLabel("lisa",JLabel.CENTER),"fourth") ;
              con.add(new JLabel("momiji",JLabel.CENTER),"fifth") ;
              frame.pack() ;
              frame.setVisible(true) ;
       }
}

指定让某个卡片显示
import java.awt.CardLayout ;
import java.awt.Container ;
import javax.swing.JFrame ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
                     JFrame frame = new JFrame("Welcome To kasumi") ;
              CardLayout card = new CardLayout() ;
              frame.setLayout(card) ;
              Container con = frame.getContentPane() ;
              con.add(new JLabel("kasumi",JLabel.CENTER),"first") ;
              con.add(new JLabel("ayane",JLabel.CENTER),"second") ;
              con.add(new JLabel("snowDrink",JLabel.CENTER),"thrid") ;
              con.add(new JLabel("lisa",JLabel.CENTER),"fourth") ;
              con.add(new JLabel("momiji",JLabel.CENTER),"fifth") ;
              frame.pack() ;
              frame.setVisible(true) ;
              //指定让某个卡片显示
              card.show(con,"fifth") ;
       }
}

卡片的翻页
import java.awt.CardLayout ;
import java.awt.Container ;
import javax.swing.JFrame ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
                     JFrame frame = new JFrame("Welcome To kasumi") ;
              CardLayout card = new CardLayout() ;
              frame.setLayout(card) ;
              Container con = frame.getContentPane() ;
              con.add(new JLabel("kasumi",JLabel.CENTER),"first") ;
              con.add(new JLabel("ayane",JLabel.CENTER),"second") ;
              con.add(new JLabel("snowDrink",JLabel.CENTER),"thrid") ;
              con.add(new JLabel("lisa",JLabel.CENTER),"fourth") ;
              con.add(new JLabel("momiji",JLabel.CENTER),"fifth") ;
              frame.pack() ;
              frame.setVisible(true) ;
              //让卡片每间隔3秒自动翻到下一个卡片
              for(int i=0;i<5;i++){
                     try{
                            Thread.sleep(3000) ;
                     }catch(InterruptedException e){}
                     card.next(con) ;
              }
       }
}
这里应该做成gif，太懒了，叫我懒队长

绝对定位布局管理器
import java.awt.FlowLayout ;
import javax.swing.JFrame ;
import javax.swing.JButton ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To kasumi") ;
              frame.setSize(280,123) ;
              frame.setLayout(null) ;
             
             
              JLabel title = new JLabel("www.kasumi.cn") ;
              JButton enter = new JButton("进入") ;
              JButton help = new JButton("帮助") ;
              //x坐标(偏移)，y坐标（偏移），宽，高
              title.setBounds(45,5,150,20) ;
              enter.setBounds(10,30,80,20) ;
              help.setBounds(150,30,120,20) ;
             
              frame.add(title) ;
              frame.add(enter) ;
              frame.add(help) ;
             
              frame.setVisible(true) ;
       }
}