nullpointerexception initializing map

[oll3i]

Map<String,String>[] rowsMap = null;
....
 
for(int i=0; i<numberOfRows; i++)
      rowsMap[i]= new HashMap<String, String>(); 
 

throws nullpointerexception ?


thank You

[Nepomuk]

First of all: Please use the [CODE]...[/code] tags! You've been a member of bytes.com for long enough to know that.

About your question: Yes, it does throw a NullPointerException. You're missing a

rowsMap = new Map<String,String>[numberOfRows];

before that loop.

Greetings,
Nepomuk

[JosAH]

First of all: Please use the [CODE]...[/code] tags! You've been a member of bytes.com for long enough to know that.

About your question: Yes, it does throw a NullPointerException. You're missing a

rowsMap = new Map<String,String>[numberOfRows];

before that loop.

Greetings,
Nepomuk

You can't have generics in an array type; make that:

rowsMap = new Map[numberOfRows];

kind regards,

Jos

[oll3i]

how do i suppress unchecked conversion warning in jsp in java class
@SuppressWarnings ("unchecked") works but in jsp eclipse shows a warning

[JosAH]

how do i suppress unchecked conversion warning in jsp in java class
@SuppressWarnings ("unchecked") works but in jsp eclipse shows a warning

I don't know where to put that @annotation to keep Eclipse's mouth shut in a
jsp file. Arrays and generics always have been a bit of a problem; read this.

kind regards,

Jos

ps. warnings here are harmless though; don't pay too much attention to them.

[oll3i]

thank You guys a lot i made it (hm we made it) finished everything works :) :) :)
i can have a break :)
so till the next project