14.11.2

Example of

do

 statement

BLOCKS AND STATEMENTS

14.11.2   Example of

do

 statement

The following code is one possible implementation of the

toHexString

 method

( 20.7.14) of class

Integer

:

public static String toHexString(int i) {

StringBuffer buf = new StringBuffer(8);

do {

buf.append(Character.forDigit(i & 0xF, 16));

i >>>= 4;

} while (i != 0);

return buf.reverse().toString();

}

Because at least one digit must be generated, the

do

 statement is an appropriate

control structure.

14.12   The

for

 Statement

The

for

 statement executes some initialization code, then executes an

Expression

,

a

Statement

, and some update code repeatedly until the value of the

Expression

 is

false

.

ForStatement:

for (

ForInit

opt

 ;

Expression

opt

 ;

ForUpdate

opt

 )

Statement

ForStatementNoShortIf:

for (

ForInit

opt

 ;

Expression

opt

 ;

ForUpdate

opt

 )

StatementNoShortIf

ForInit:

StatementExpressionList

LocalVariableDeclaration

ForUpdate:

StatementExpressionList

StatementExpressionList:

StatementExpression

StatementExpressionList

 ,

StatementExpression

The

Expression

 must have type

boolean

, or a compile time error occurs.

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