Can you use conditional expressions on a switch in Android?

Question

I can’t find a direct answer yes or no to this in my search. On Android, is there a way to use a conditional statement in case-switch? For example, if age is an int value:

switch (age){ case (>79): // Do this stuff break; case (>50): // Do this other stuff break; etc, etc 

I tried several ways to encode this (completely shooting in the dark) and come up with compiler errors, and I also tried the nested IF statement, but it does not support breaking, so the logic breaks and it also ends up executing ELSE code in nesting. I feel that the switch is my best bet, but I can't find an example of the correct syntax for what I'm trying to do! Any help would be greatly appreciated. All the examples that I find just use a patch case for a few things, for example, if it is 1, do it if it does 2, but without making 100 cases to check the age, I'm not sure how else this works.

Answer 1

Not. You cannot do this

 switch (age){ case (>79): // Do this stuff break; case (>50): // Do this other stuff break; } 

You need if and else ,

 if (age > 79) { // do this stuff. } else if (age > 50) { // do this other stuff. } // ... 

Answer 2

Try this beautiful and minimalist approach.

 age > 79 ? first_case_method() : age < 50 ? second_case_method() : age < 40 ? third_case_method() : age < 30 ? fourth_case_method() : age < 20 ? fifth_case_method() : ... : default_case_method(); 

Answer 3

You cannot use this if it is an expression.

 if(age > 79) { //do stuff } else if(age > 50) { //do stuff } else { /do stuff } 

etc...

Answer 4

If you use a loop, you can see What is the "continue" keyword and how does it work in Java? . This is not a good place to use a switch.

 if(age > 79) { //do stuff continue; // STOP FLOW HERE AND CONTINUE THE LOOP } else if(age > 50) { //do stuff continue; // STOP FLOW HERE AND CONTINUE THE LOOP } 

Answer 5

each switch case must be integer or string with JavaSE 7, and you are trying to pass a boolean to it, so it is not possible. Read the oracle document to learn more about the java switch in more detail http://docs.oracle.com/javase/tutorial/java/nutsandbolts/switch.html

Answer 6

You cannot use conditional statements with switch .

But you can do this with if ! If you have a loop, you can use continue to stop any upcoming lines and start at the beginning of the innermost loop.

 if(age>76){ // Code... continue; }else if(age>50){ // More Code... continue; }else{ // Even more code... continue; } 

Answer 7

It can be done. The code should be slightly modified.

 public static void main(String[]arguments) { int x=1, age=55; switch(x) { case 1: if((age>=60)&&(age<200)) System.out.println("Senior Citizen"); case 2: if((age>=18)&&(age<60)) System.out.println("Adult"); case 3: if((age>=12)&&(age<18)) System.out.println("Teenager"); break; default : System.out.println("Child"); break; } }