java - For loop iterating through table -

say created table

char[][] table = new char[5][5]; 

and wanted iterate using for loop creating "space."

for (int = 0; < table.length; i++) (int j = 0; j < table[i].length; j++)        table[i][j] = ' ';    

in second line [i] mean in table[i].length? why can't table.length first line? thank

your declaration :

char[][] table = new char[5][5]; 

is equivalent :

// declare array of size 5, each element reference one-dimen char[] array char[][] table = new char[5][];   // initialize elements of table array, i.e. each row table[0] = new char[5]; table[1] = new char[5]; table[2] = new char[5]; table[3] = new char[5]; table[4] = new char[5]; 

note: have initialized each "row" arrays of different size, instance

table[3] = new char[255]; 

and table[1].length 5, while table[3].length 255.

these sizes of ["rows"] arrays independent of "aggregate" array size table.length, therefore have loop thru each "row" using size of "row" array.