Nested Switch Statements

It is possible to have as witch as part of the statement sequence of an outer switch. This is called a nested switch. Even if the case constants of the inner and outer switch contain common values, no conflicts will arise.
For example,
the following code fragment is perfectly acceptable.
switch(ch1) 
{ 
case 'A': 
System.out.println("This A is part of outer switch.");
 switch(ch2)
 {
 case 'A':
 System.out.println("This A is part of inner switch");
 break; case 'B':
 //
 ... } 
// end of inner switch break; case 'B': // ...