版权声明:本文为博主原创文章,转载请注明地址。 https://blog.csdn.net/huangxiaoguo1/article/details/85014370
-
表达式
三目表达式:condition? expr1:expr2
??运算符:expr1:expr2
-
案例
void main(List<String> args) {
int gender = 1;
String str = gender == 0 ? "Male" : "Frmale=$gender";
print(str);
String a;
String b = "java";
String c = a ?? b;
//a为空的时候打印b,a不为空是打印a
print(c);
a = "huang";
b = "java";
c = a ?? b;
print(c);
}
Frmale=1
java
huang