fun theAnswer() = 42
实际上等于
fun theAnswer ():Int{
return 42;
}
类似java的switch逻辑分支函数
fun transform(color: String): Int = when (color) {
"Red" -> 0
"Green" -> 1
"Blue" -> 2
else -> throw IllegalArgumentException("Invalid color param value")
}
等于
fun transform(color: String): Int {
return when (color) {
"Red" -> 0
"Green" -> 1
"Blue" -> 2
else -> throw IllegalArgumentException("Invalid color param value")
}
如果用java表达 那么是
public int transform(String color){标签:Blue,return,函数,color,kotlin,Invalid,举例,fun,Red From: https://blog.51cto.com/u_15458814/5883565
switch(color){
case "Red"
return 0;
case "Green";
return 1;
case "Blue":
return 2;
default:
throw new IllegalArgumentException("Invalid color param value");
}
}