numbertest.java~11~

来自「提供了常用的JAVA技术的示例」· JAVA~11~ 代码 · 共 39 行

package numbertest;

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

public class numbertest {
  boolean packFrame = false;

  //Main method
  public static void main(String[] args) throws IOException
  {
    final int max_num=50;
    //从键盘输入一个整数并存放到变量x中
    InputStreamReader ir;
    BufferedReader in;
    ir=new InputStreamReader(System.in);
    in=new BufferedReader(ir);
    System.out.println("Input x is :");
    String s=in.readLine();
    double x=double.parseInt(s);

    //判断大小
    if (x<max_num)
      System.out.println("x="+x);
    else
      System.out.println("overflow !!");


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