Java Quick Reference - Flow Control

Language Fundamentals

Operators and Assignments

Flow Control and Exceptions

Declarations and Access Control

Garbage Collection

Overloading and Overriding

Threads

The java.lang Package

The java.util Package

The java.awt Package

The java.io Package

References

Miscellaneous Notes

Tips & Traps

Mock Exams

Flow Control and Exception Handling - Label Statements

Syntax

    identifier:

can be used with loops or statement blocks
must precede the statement
useful with break or continue which normally terminate or continue the innermost block

outer:
    for( i=0; i<10; i++ ){
        for( j=10; j>0; j--){
            if( j == 5 ) {
             break outer;       // exit entire loop
            } 
        }            
    }
     
Output: 0 5     
     
outer:
    for( i=0; i<10; i++ ){
        for( j=10; j>0; j--) {
            if( j== 5 ) {
              continue outer;   // next iteration of i
            }  
        }
    }
    
Output: 10 5

Note

two or more statements can have the same name as long as one is not enclosed within the other

Example Code

	Statements	if	switch	for	while	do
	Labels	Exceptions	Handling Exceptions	try-catch-finally