BlogJava-波波的java之路-随笔分类-java 代码

关系运算符的使用

姜波 — Fri, 28 Mar 2008 13:52:00 GMT

public class guanxi
{
public static void main (String args[])
{
  float a=10.0f;
  double b=10.0;
  if(a==b)
  {
   System.out.println("a和b相等");

  }
  else
                  {
                     System.out.println("a和b不相等");
                  }
}
}

姜波 2008-03-28 21:52 发表评论

关系和逻辑运算符

姜波 — Fri, 28 Mar 2008 13:52:00 GMT

import java.util.*;
public class Bool
{
public static void main(String args[])
{
  Random rand= new Random ();
  int i=rand.nextInt()%100;
  int j=rand.nextInt()%100;
  System.out.println("i="+i);
  System.out.println("j="+j);
  System.out.println("i>j is "+(i>j));
  System.out.println("i   System.out.println("i>=j is "+(i>=j));
  System.out.println("i<=j is "+(i<=j));
  System.out.println("i==j is "+(i==j));
  System.out.println("i!=j is "+(i!=j));
  System.out.println("(i<10)&&(j<10) is "+((i<10)&&(j<10)));
  System.out.println("(i>10)||(j>10) is "+((i>10)||(j>10)));
      }
}

姜波 2008-03-28 21:52 发表评论

递增递减的使用

姜波 — Fri, 28 Mar 2008 13:51:00 GMT

public class autoinc
{
public static void main (String[] args){
  int i= 1;
     System.out.println("i:"+i);
  System.out.println("++i:"+ ++i);
  System.out.println("i++:"+ i++);
  System.out.println("i:"+i);
  System.out.println("--i:"+ --i);
  System.out.println("i--:"+ i--);
  System.out.println("i:"+i);
}

}

姜波 2008-03-28 21:51 发表评论

SimpleTypes and suanshu

姜波 — Tue, 25 Mar 2008 14:19:00 GMT

public class SimpleTypes {
public static void main (String args [])
    {
    byte b=0x55;
    short s=0x55ff;
    int i=1000000;
        char c='c';
    float f=0.23f;
    double d=0.7E-3;
    boolean bool=true;
    System.out.println("b="+b);
    System.out.println("s="+s);
    System.out.println("i="+i);
    System.out.println("c="+c);
    System.out.println("f="+f);
    System.out.println("d="+d);
    System.out.println("bool="+bool);
        }
}

    /**
    * @算术运算符的运算
    */
public class suanshu{
   public static void main (String args[])
   {
       int a=5+4;
       int b=a*2;
       int c=b/4;
       int d=b-c;
       int e=-d;
       int f=e%4;
       double g=18.4;
       double h=g%4;
       int i=3;
       int j=i++;
       int k=++i;
           System.out.println("a="+a);
           System.out.println("b="+b);
           System.out.println("c="+c);
           System.out.println("d="+d);
           System.out.println("e="+e);
           System.out.println("f="+f);
           System.out.println("g="+g);
           System.out.println("h="+h);
           System.out.println("i="+i);
           System.out.println("j="+j);
           System.out.println("k="+k);

   }
}

姜波 2008-03-25 22:19 发表评论