4*4 char matrix

Question

hello was wondering if anyone could look at this code and tell me why i cant get it to print the whole string, at the moment it only prints the first 4 letters over and over again if u type in a 16 letter string
thanks!!!
System.out.print("Enter letters to convert: ");
// open up standard input
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String test = null;
// read the username from the command-line; need to use try/catch with the
// readLine() method
try {
test = br.readLine();
} catch (IOException ioe) {
System.out.println("IO error trying to read the word!");
System.exit(1);
// for (int k = 0; k < test.length(); k++)
// char a = test.charAt(k);
char matrix[][] = new char [4][4];
// String test = "hellotojavaworld";
for (int i=0; i<4; i++)
for(int j=0; j<4; j++)
matrix[i][j]=test.charAt(i);
//matrix[j]=test.toCharArray();
//matrix[0] = test.toCharArray();
// Print it out to prove it exists :)          
for (int r=0; r<matrix.length; r++)          
StringBuffer outputLine = new StringBuffer();                                        
for (int c=0; c<matrix[0].length; c++)               
outputLine.append(matrix[r][c]);                    
outputLine.append("\t");
// adds a tab character               
System.out.println(outputLine.toString());          
}

Answer 1

thanks im not sure what im doing obviously i tried putting in another loop for chars:
char matrix[][] = new char [4][4];
// String test = "hellotojavaworld";
for(int k=0; k <matrix[0].length; k++)
for (int i=0; i<4; i++)
for(int j=0; j<4; j++)
matrix[i][j]=test.charAt(k);
but it still doesnt work, any ideas would be appreciated!!