java : create a matrix of strings

Question

I begin with java and I'm searching for how to create an array 2d of strings : my array 2d should contains :

10 20 "OK"
5  30 "KO"
20 100 "NA"
10 60  "OK"

String[][] matrix = new String[i][j];
for(r=0;i<matrix.length; r++) {
 for (int c=0; c<matrix [r].length; c++) {
     System.out.print("10 " + matrix [r][c]);
 }

So far so good. What is your question? Do you want to know how to stuff the string values into the array? — Robert Harvey
– Robert Harvey, Commented Aug 9, 2011 at 14:50

Jigar Joshi · Accepted Answer · 2011-08-09 14:51:10Z

7

String[][] matrix = { {"10","20","OK"},{"5","30","KO"}, {"20","100","NA"}, {"10","60","OK"} };

answered Aug 9, 2011 at 14:51

Jigar Joshi

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Comments

user unknown · Accepted Answer · 2011-08-09 14:56:52Z

4

What Florin said, but with simplified for-loop:

String [][] matrix =  { {"10","20","OK"}, {"5","30","KO"}, {"20","100","NA"}, {"10","60","OK"} };

for (String [] line : matrix) {
    for (String s: line) {
        System.out.print ("10 " + s);
    }
}

answered Aug 9, 2011 at 14:56

user unknown

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Comments

Snicolas · Accepted Answer · 2011-08-09 14:52:28Z

1

All seems good. Maybe you could do a better use of for each loops in java :

String[][] matrix = new String[i][j];
for( String[] rows : matrix) {
 for (String row : rows ) {
     System.out.println("10 " + row );
 }

Regards, Stéphane

answered Aug 9, 2011 at 14:52

Snicolas

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Comments

Florin Vistig · Accepted Answer · 2011-08-09 14:53:53Z

0

What @Jigar said

String[][] matrix = { {"10","20","OK"},{"5","30","KO"}, {"20","100","NA"}, {"10","60","OK"} };

Plus print:

for(r=0;i<matrix.length; r++) {
 for (int c=0; c<matrix [r].length; c++) {
     System.out.print(matrix [r][c] + " ");
 }
 System.out.println();
}

answered Aug 9, 2011 at 14:53

Florin Vistig

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1 Comment

lamisse Over a year ago

I got an ArrayIndexOutOfBoundsExceptions , 3 values for each line ?? and when I type String[][] matrix = { {"test","10","20","OK"},...} it works , where is the problem?

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