VB to Java

Basics

VB Java
'This line is a comment //this line is a comment

/*this is a multi-line
comment*/
lines end with carriage return lines end with semicolon

Variables

VB Java
Dim x as integer int x;
Dim x as long long x;
Dim userName as String String userName = new(String);
Dim x as single float x;
Dim x as double double x;
x = 5 x = 5;
x = 5d;
x = 5f;
x = 5L;

Operator shortcuts

VB Java
i = i + 5 i += 5;
i = i -5 i -= 5;
i = i + 1 i++;
i = i - 1 i--;
userName = userName + "-San" userName += "-San";

Branches

VB Java
x = 5 (x == 5)
x <> 5 (x != 5) 
if i < 5 then
  ...
end if

if(i < 5){
  ...
} // end if

if i < 5 then
  ...
else
  ...
end if

if(i < 5){
  ...
} else {
  ...
} // end if

Dim userName as String
if userName = "Wally" then
  ...
end if

String userName;
if (userName.equals("Wally")){
  ...
} // end if

Dim userName as String
if ucase(userName) = "WALLY" then
  ...
end if

String userName;
if (userName.equalsIgnoreCase("WALLY")){
  ...
} // end if

Select case x
  case 1
    ...
  case 2
    ...
  case else
end select
  
switch (x){
  case 1:
    ...
  case 2:
    ...
  default:
    ...
} // end switch

Loops

VB Java 
Do while x < 10
  ...
Loop

while(x < 10){
  ...
} // end while

Do
  ...
Loop while x < 10

do{
  ...
} while ( x < 10);

for i = 1 to 10
  ...
next i

for (i = 0; i < 10; i++){
  ...
} // end for 

for i = 10 to 1 step -1
  ...
next i

for (i = 10; i > 0; i--);
  ...
} // end for

Components

VB Java
form Frame
label Label
command button Button
textbox TextField
multi-line text box TextArea
Hor / Ver Scrollbar Scrollbar
Listbox List
combo box Choice
Check boxes Checkbox
Radio buttons (frame) Checkbox (CheckboxGroup)

GUI I/O

VB Java
lblOutput.caption = "hi there" lblOutput.setText("hi there");
myVar = txtInput.text myVar = txtInput.getText();
x = scrHowMany.value x = scrHowMany.getValue();

subs, functions, and events

VB Java
form_load init (applet) or constructor (class)
function doThis(param as Integer) as String public String doThis(int param){
sub doThis(param as Integer) public void doThis(int param){ 
sub cmdOk_click()
  ...
end sub

sub (other events here)
 ...
end sub

cmd.addActionListener(this);
public void ActionPerformed(ActionEvent e){
  if (e.getActionCommand().equals cmdOK.getText()){
    ...
  } else {
    ... check other buttons
  } // end if
} // end actionPerformed