java中运算符的理解-0509

class Demo01 
{
    public static void main(String[] args) 
    {
        //int j=4;
        //短路与的时候，当左边为false的时候，右边就不会再判断
        //System.out.println(5>4&&j++>3);
        //System.out.println(j);
        //短路或的时候，当左边为true的时候，右边就不会再判断
        //System.out.println(5>4 || j++>3);
        //System.out.println(j);
        //三元运算符
        int a = 2;
        int b = 5;
        System.out.println(a>b?1:2);
    }
}

 

class Test01 
{
    public static void main(String[] args) 
    {
        /*int a1 = 100;
        double a2 = 2.4;
        float b = 2.4f;
        char ch = '中';
        char ch2 = '国';
        System.out.println(a1+"..."+a2+"..."+b);
        System.out.print(ch+"..."+ch2);
        double i= 2.4;
        int a = (int)i;
        System.out.print(a);*/
        System.out.println("---------------------------"+"商城库存清单"+"-------------------------------");
        System.out.println("品牌型号"+"\t"+"尺寸"+"\t"+"价格"+"\t"+"库存数");
        String  Product_name1 = "MacBookAir";
        String  Product_name2 = "ThinkpadT450";
        String  Product_name3 = "ASUS-FL5800";
        double  size1 = 13.3;
        double  size2 = 14.0;
        double  size3 = 15.6;
        double  price1 = 6988.88;
        double  price2 = 5999.99;
        double  price3 = 4999.5;
        int  num1 = 5;
        int  num2 = 10;
        int  num3 = 18;
        System.out.println(Product_name1+"\t"+size1+"\t"+price1+"\t"+num1);
        System.out.println(Product_name2+"\t"+size2+"\t"+price2+"\t"+num2);
        System.out.println(Product_name3+"\t"+size3+"\t"+price3+"\t"+num3);
        System.out.println("------------------------------------------------------------------------");
        int anum = num1 + num2 + num3;
        double aprice = price1 + price2 + price3;
        System.out.println("总库存数："+anum);
        System.out.println("库存商品总金额："+aprice);
    }
}