- Java当中的运算符
- 要点一:
- int i = 3 / 2,请问 i 的值?
publicclassTest{
publicstaticvoid main(String args[]){
int i =3/2;
System.out.println(i);
}
}
- 要点二:
- i++与++i的区别?
publicclassTest{
publicstaticvoid main(String args[]){
int i =5;
int j = i+++5;
System.out.println(i);
System.out.println(j);
}
}
- i++是先运算,后自加;++i是先自加,再运算。
- 要点三: = 与 == 的区别?
- = :是赋值号,== 是判断左右两边是否相等并返回boolean值。
publicclassTest{
publicstaticvoid main(String args[]){
int i =5;
int j =6;
boolean b = i == j;
System.out.println(b);
}
}
- 逻辑运算符
- 短路与 a && b,会先判断a的真假,若为假,后面的b不运算。而逻辑与 a & b,都会运算。
- publicclassTest{
- publicstaticvoid main(String args[]){
- boolean a =true;
- boolean b =false;
- boolean c = a & b;
- boolean d = a && b;
- System.out.println(c);
- System.out.println(d);
- int i =5;
- boolean e = i >6&& i++>7;
- System.out.println(e);
- System.out.println(i);
- }
- }
时间: 2024-08-22 17:39:12