Управляющие конструкции

Оператор if

if ( weatherIsGood ) {
walkInThePark ();
} else {
learnJavaOnStepic ();
}

Тернарный оператор

if ( weatherIsGood ) {
System . out. println (" Weather is good ");
} else {
System . out. println (" Weather is bad");
}
// same effect , but much shorter
System . out. println (" Weather is "
+ ( weatherIsGood ? " good " : " bad" ));

Оператор switch

switch (digit) {
    case 0:
        text = " zero ";
        break ;
    case 1:
        text = "one ";
        break ;
    // ...
    default :
        text = "??? ";
}

Цикл while

while ( haveTime () && haveMoney ()) {
goShopping ();
}

Цикл do while

do {
goShopping ();
} while ( haveTime () && haveMoney ());

Цикл for

for ( int i = 0; i < args . length ; i++) {
System . out. println ( args [i]);
}

Цикл foreach

for ( String arg : args ) {
System . out. println ( arg );
}

Оператор break

boolean found = false ;
for ( String element : haystack ) {
if ( needle . equals ( element )) {
found = true ;
break ;
}
}

Оператор break с меткой

boolean found = false ;
outer :
for ( int [] row : matrix ) {
for ( int x : row) {
if (x > 100) {
found = true ;
break outer ;
}
}
}

Оператор continue

int count = 0;
for ( String element : haystack ) {
if (! needle . equals ( element )) {
continue ;
}
count ++;
}

Оператор continue с меткой

// todo