Can we have label inside switch case java

Question

I have below pseudocode code with switch block with 4 cases. In 4th case I have if else conditions and when some condition satisfies, I am reducing list size by 1 and it has to come back to case 4 again and execute from the beginning of the 4th case. I tried to create a label in case 4: but it is giving the compilation error.

 switch(choice) {

 case 1:   /* do operations */
          break;
 case 2: /* do operations */
          break;
 case 3: /* do operations */
          break;
 case 4: 
        mylabel:
      if(condition1)  {

       }
       else if(condition2) {

       }
       else {
        break mylabel;
       }
       break;
default : 
}

Above code gives the compilation error. But I want the program flow to be something like that. So I tried below code:

switch(choice) {

case 1:   /* do operations */
          break;
case 2: /* do operations */
          break;
case 3: /* do operations */
          break;
case 4: 
        if(condition1)  {

       }
       else if(condition2) {

       }
       else {
        break case 4;
       }
       break;
  default : 
  }

With above code still, I am facing compilation issues. Is there any alternative for achieving the same. Here I need to go back to the beginning of the same case statement from where I will break. Hence it is different.

I expect you will just have to wrap your `case 4` code in a `do { ... } while (cond)` loop. — AJNeufeld, Jan 28 '17 at 04:40

jitendra varshney · Accepted Answer · 2017-10-29T10:07:46.137

1

use label and while loop. it will work

switch (choice) {
    case 1:   /* do operations */
      break;
    case 2: /* do operations */
      break;
    case 3: /* do operations */
      break;
    case 4:
        mylabel:{
            while(true){
                   if(condition1)  {

                   }else if(condition2) {

                   }else {
                       break mylabel;// breaks the while-loop
                   }
             }
         }
     default:
         break;
   }

edited Oct 29 '17 at 10:07

answered Jan 28 '17 at 05:08

jitendra varshney

3,484
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I was able to go back to label with this solution. But I did it without loop inside label. Thanks – Babanna Duggani Jan 31 '17 at 17:43
ok your welcome, you can also do without loop – jitendra varshney Feb 01 '17 at 04:47

score 0 · Answer 2 · answered Jan 28 '17 at 04:58

    public void switchFunction(String choice){ 
      switch(choice) { 
        case 1:   
          do1();
          break; 
        case 2: /* do operations */
          break; 
        case 3: /* do operations */
          break; 
        case 4: 
          recursiveFunction();
          break;   
        default :
      } 
    }

    public void recursiveFunction(){ 
      if(condition1){
        doSomething(); 
      }
      else if(condition2){
        doSomethingElse();
     }
    else{
     /* You can call it as much as you want! */
    recursiveFunction();

} }

Can we have label inside switch case java

2 Answers2