int a = 10;
int b = 10;
System.out.println("" + a + b);//1010:从前往后字符串相加
//System.out.println("" + a - b);//编译报错
System.out.println("" + a * b);//100:遇到乘法,先做乘法,乘法优先级高
System.out.println("" + a / b);//1:遇到除法,先做除法,除法优先级高
转载于:https://my.oschina.net/sniperLi/blog/392732