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课程设计String类的实现源代码,采用可视化图形用户界面完成
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import java.awt.*;
import java.util.Scanner;
import javax.swing.*;
import java.awt.event.*;
public class app1 extends JFrame {
static JFrame frame;
static JButton []jb=new JButton[15];
static JTextField jt1;
static JTextField jt2;
static JTextField jt3;
static JTextField jt4;
static JTextField jt5;
static JPanel pan=new JPanel();
static JLabel jl;
static JLabel jl1;
static JLabel jl2;
static JLabel jl3;
static JLabel jl4;
//static JLabel jl3;
public app1()
{frame =new JFrame("String类的实现");
jl=new JLabel("输入串1:");
jl.setSize(80,100);
jl.setLocation(30,-40);
jl1=new JLabel("输入串2:");
jl1.setSize(80,100);
jl1.setLocation(30,20);
jl2=new JLabel("结果窗:");
jl2.setSize(80,100);
jl2.setLocation(30,75);
import java.util.Scanner;
import javax.swing.*;
import java.awt.event.*;
public class app1 extends JFrame {
static JFrame frame;
static JButton []jb=new JButton[15];
static JTextField jt1;
static JTextField jt2;
static JTextField jt3;
static JTextField jt4;
static JTextField jt5;
static JPanel pan=new JPanel();
static JLabel jl;
static JLabel jl1;
static JLabel jl2;
static JLabel jl3;
static JLabel jl4;
//static JLabel jl3;
public app1()
{frame =new JFrame("String类的实现");
jl=new JLabel("输入串1:");
jl.setSize(80,100);
jl.setLocation(30,-40);
jl1=new JLabel("输入串2:");
jl1.setSize(80,100);
jl1.setLocation(30,20);
jl2=new JLabel("结果窗:");
jl2.setSize(80,100);
jl2.setLocation(30,75);
jl3=new JLabel("辅助窗1:");
jl3.setSize(80,100);
jl3.setLocation(345,-40);
jl4=new JLabel("辅助窗2:");
jl4.setSize(80,100);
jl4.setLocation(500,-40);
jb[1]=new JButton("大写转换");
jb[1].addActionListener(new MyListener());
jb[1].setActionCommand("a");
jb[2]=new JButton("小写转换");
jb[2].addActionListener(new MyListener());
jb[2].setActionCommand("b");
jb[3]=new JButton("比较大小");
jb[3].addActionListener(new MyListener());
jb[3].setActionCommand("c");
jb[4]=new JButton("连接两串");
jb[4].addActionListener(new MyListener());
jb[4].setActionCommand("d");
jb[5]=new JButton("去掉首部空格");
jb[5].addActionListener(new MyListener());
jb[5].setActionCommand("e");
jb[6]=new JButton("截取字符串");
jb[6].addActionListener(new MyListener());
jb[6].setActionCommand("f");
jb[7]=new JButton("字符替换");
jb[7].addActionListener(new MyListener());
jb[7].setActionCommand("g");
jb[8]=new JButton("字符串替换");
jb[8].addActionListener(new MyListener());
jb[8].setActionCommand("h");
jl3.setSize(80,100);
jl3.setLocation(345,-40);
jl4=new JLabel("辅助窗2:");
jl4.setSize(80,100);
jl4.setLocation(500,-40);
jb[1]=new JButton("大写转换");
jb[1].addActionListener(new MyListener());
jb[1].setActionCommand("a");
jb[2]=new JButton("小写转换");
jb[2].addActionListener(new MyListener());
jb[2].setActionCommand("b");
jb[3]=new JButton("比较大小");
jb[3].addActionListener(new MyListener());
jb[3].setActionCommand("c");
jb[4]=new JButton("连接两串");
jb[4].addActionListener(new MyListener());
jb[4].setActionCommand("d");
jb[5]=new JButton("去掉首部空格");
jb[5].addActionListener(new MyListener());
jb[5].setActionCommand("e");
jb[6]=new JButton("截取字符串");
jb[6].addActionListener(new MyListener());
jb[6].setActionCommand("f");
jb[7]=new JButton("字符替换");
jb[7].addActionListener(new MyListener());
jb[7].setActionCommand("g");
jb[8]=new JButton("字符串替换");
jb[8].addActionListener(new MyListener());
jb[8].setActionCommand("h");
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