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【第18章：图形界面】_文本组件：JTextComponent

发布时间：2021-01-16 18:17:53编辑：雪饮阅读（）

 可编辑输入框与不可编辑输入框

import java.awt.GridLayout ;
import javax.swing.JFrame ;
import javax.swing.JTextField ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To kasumi") ;
              frame.setLayout(new GridLayout(2,2)) ;
              frame.setSize(300,100) ;
              frame.setLocation(300,200) ;
              //可编辑
              JLabel nameLab = new JLabel("输入用户姓名：") ;
              frame.add(nameLab) ;
             
              JTextField name = new JTextField() ;
              frame.add(name) ;
             
              //不可编辑
              JLabel noedLab = new JLabel("不可编辑文本：") ;
              frame.add(noedLab) ;
             
              JTextField noed = new JTextField("kasumi") ;
              noed.setEnabled(false) ;
              frame.add(noed) ;
 
              frame.setVisible(true) ;
       }
}

密码输入框（默认回显）
import java.awt.GridLayout ;
import javax.swing.JFrame ;
import javax.swing.JPasswordField ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To MLDN") ;
              frame.setLayout(new GridLayout(1,2)) ;
             
              JLabel lab1 = new JLabel("请输入密码：") ;
              frame.add(lab1) ;
             
              JPasswordField jpf1 = new JPasswordField() ;
              frame.add(jpf1);
             
              frame.setSize(300,100) ;
              frame.setLocation(300,200) ;
              frame.setVisible(true) ;
       }
}

密码输入框(设置回显)
import java.awt.GridLayout ;
import javax.swing.JFrame ;
import javax.swing.JPasswordField ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To kasumi") ;
              frame.setLayout(new GridLayout(1,2)) ;
             
              JLabel lab1 = new JLabel("请输入密码：") ;
              frame.add(lab1) ;
              //设置回显
              JPasswordField jpf1 = new JPasswordField() ;
              jpf1.setEchoChar('#') ;
              frame.add(jpf1);
             
              frame.setSize(300,100) ;
              frame.setLocation(300,200) ;
              frame.setVisible(true) ;
       }
}

文本域
import java.awt.GridLayout ;
import javax.swing.JFrame ;
import javax.swing.JTextArea ;
import javax.swing.JLabel ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To MLDN") ;
              frame.setLayout(new GridLayout(1,2)) ;
             
              JLabel lab = new JLabel("文本域：");
              frame.add(lab) ;
             
              //创建一个文本域，参数宽度和高度
              JTextArea jta = new JTextArea(3,10) ;
              frame.add(jta);
             
              frame.setSize(300,150) ;
              frame.setLocation(300,200) ;
              frame.setVisible(true) ;
       }
}

带滚动条的文本域
import java.awt.GridLayout ;
import javax.swing.JFrame ;
import javax.swing.JTextArea ;
import javax.swing.JLabel ;
import javax.swing.JScrollPane ;
public class TestJava{
       public static void main(String args[]){
              JFrame frame = new JFrame("Welcome To MLDN") ;
              frame.setLayout(new GridLayout(1,2)) ;
             
              JLabel lab = new JLabel("文本域：");
              frame.add(lab) ;
             
              //创建一个文本域，参数宽度和高度
              JTextArea jta = new JTextArea(3,10) ;
              JScrollPane scr = new JScrollPane(jta,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS ,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS ) ;
              frame.setLayout(new GridLayout(1,1)) ;
              frame.add(scr);
             
              frame.setSize(300,150) ;
              frame.setLocation(300,200) ;
              frame.setVisible(true) ;
       }
}