application1.java

来自「提供了常用的JAVA技术的示例」· Java 代码 · 共 50 行

package switc;

import javax.swing.UIManager;
import java.awt.*;
import java.io.*;

public class Application1 {

  //Main method
  public static void main(String[] args) throws IOException{
    int x=10,y=5,z;

    InputStreamReader ir;
    BufferedReader in;
    ir=new InputStreamReader(System.in);
    in=new BufferedReader(ir);
    System.out.println("input one of the chars :");
    String s=in.readLine();
    char ch=s.charAt(0);

    switch(ch){
      case '+':
        z=x+y;
        System.out.println("x+y="+z);
        break;
      case '-':
        z=x-y;
        System.out.println("x-y="+z);
        break;
      case '*':
        z=x*y;
        System.out.println("x*y="+z);
        break;
      case '/':
        z=x/y;
        System.out.println("x/y="+z);
        break;
      default:
        System.out.println("input error !");
    }

    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new Application1();
  }
}