The Java Language Specification, Third Edition

14.15 The break Statement BLOCKS AND STATEMENTS
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Where a and i are compiler-generated identifiers that are distinct from any other
identifiers (compiler-generated or otherwise) that are in scope at the point where
the enhanced for statement occurs.
DISCUSSION
The following example, which calculates the sum of an integer array, shows how enhanced
for works for arrays:
int sum(int[] a) {
int sum = 0;
for (int i : a)
sum += i;
return sum;
}
Here is an example that combines the enhanced for statement with auto-unboxing to translate
a histogram into a frequency table:
Map histogram = ...;
double total = 0;
for (int i : histogram.values())
total += i;
for (Map.Entry e : histogram.entrySet())
System.out.println(e.getKey() + "" + e.getValue() / total);
14.15 The break Statement
A break statement transfers control out of an enclosing statement.
BreakStatement:
break Identifieropt ;
A break statement with no label attempts to transfer control to the innermost
enclosing switch, while, do, or for statement of the immediately enclosing
method or initializer block; this statement, which is called the break target, then
immediately completes normally.
To be precise, a break statement with no label always completes abruptly, the
reason being a break with no label. If no switch, while, do, orfor statement in
the immediately enclosing method, constructor or initializer encloses the break
statement, a compile-time error occurs.
A break statement with label Identifier attempts to transfer control to the
enclosing labeled statement (§14.7) that has the same Identifier as its label; this
DRAFT