j02050504.java

经典java教材《java完美经典》一书中源码的完全收集

import java.lang.*;

class j02050504
{
  public static void main(String para[])
  {
    boolean B1 = false,B2 = true,Result;
    Result = !B1;
    System.out.println("!B1 = " + Result);
    Result = B1 && B2;
    System.out.println("B1 && B2 = " + Result);
    Result = B1 || B2;
    System.out.println("B1 || B2 = " + Result);
        
    if (Result = B1 ^ B2) //B1^B2之值设定给 Result，还会再回传其值
      System.out.println("B1 ^ B2 = " + Result);
    
    int Var1 = 2,Var2 = 100;
    if (Var1!=0 && Var2/Var1 >=40)
    {  // Var1 若=0 直接回传 false 不再检验 Var2/Var1 的值是否>=40
       // 可避免计算时 "整数除以0" 的错误
      System.out.println("Var2/Var1 = " + Var2/Var1); 
    }    
  }
}