Control Flow

From Abap2Java

Contents 1 ABAP 1.1 Unconditional loops with DO 1.2 Conditional loops with WHILE 1.3 Looping over internal tables with LOOP 1.4 Conditional branches with CASE 2 Java 2.1 Conditional or unconditional loops with for 2.2 Conditional loops with do ... while 2.3 Conditional loops with while 2.4 Looping over iterable collections with for 2.5 Conditional branches with if 2.6 Conditional branches with switch 2.7 Fast Assignment with ? ... :

ABAP

Unconditional loops with DO

DO 100 TIMES.
  WRITE: 'No.' , sy-tabix , '.' .
ENDDO.

Conditional loops with WHILE

WHILE i < 100. 
   i = i + 1.
ENDWHILE.

Looping over internal tables with LOOP

LOOP AT lt_my_table ASSIGNING <fs_line>.
  <fs_line>-my_change_date = sy-datum.
ENDLOOP.

Conditional branches with CASE

CASE n.
   WHEN 1.
     "code block
   WHEN 2.
     "code block
   WHEN OTHERS.
     "code block
ENDCASE.

Java

Conditional or unconditional loops with for

for (int i = 0; i < 100; i++) {
  System.out.print( "No." +  i + "." );
}

Conditional loops with do ... while

do {
   i++;
}
while ( i < 100 );

Conditional loops with while

List<MyClass> c = new List<MyClass>();
Iterator i = c.iterator();
while ( i.hasNext() ) {
   MyClass m = (MyClass) i.next();
}

Looping over iterable collections with for

List<MyClass> c = new List<MyClass>();
for (MyClass m: c) {
   System.out.print(m);
}

Conditional branches with if

if ( a == b ) {
   // codeblock 
} else if ( a > b ) {
   // codeblock
} else {
   // codeblock
}

Conditional branches with switch

switch(n) {
   case 1:
      // Code
   break;
   case 2:
      // Code
   break;
   default:
      // Code
   break;
}

Fast Assignment with ? ... :

String answer (a == b) ? "yes" : "no";