Java String Array Get Max

-1

I have a 2D String array and I'd like to print and get the maximum value of the second row. I've searched for methods to get the maximum value of each row but it's not working.

Here's what I have so far:

    String stringArray = new String[6][1];  



    for (int i = 0; i < stringArray.length; i++){        

        double max = Integer.MIN_VALUE;



        System.out.println();



        for (int j = 0; j < stringArray[i].length; j++){                   



            System.out.print("Value " + (i + 1) + "t");               



            stringArray[1][j] = String.valueOf(Math.random());



            System.out.print(stringArray[1][j] + "t");  



            if (Integer.parseInt(stringArray[1][j]) > max){

                max = Double.parseDouble(stringArray[1][j]);                    

            }                   

        }



        System.out.println();  // to print in matrix format



        System.out.println("n Max value is " + max);

    }

I tried to change the i's and j's and got nothing. The result is so weird (and wrong), probably because it's together with the print matrix format.

Suggestions?

asked Nov 28 '18 at 17:57

Marcelo

291

1

new String[6][1] - technically it is a 1D array.

– user7
Nov 28 '18 at 18:00

Have you tried using .length?

– Frontear
Nov 28 '18 at 18:01

Why stringArray[1][j]? Change it to stringArray[i][j]

– forpas
Nov 28 '18 at 18:01

2

Integer.parseInt will not work here as Math.random() returns a double. What is your intention here?

– user7
Nov 28 '18 at 18:01

As per this statement String stringArray = new String[6][1]; you will have 6 rows with 1 column -- What do you mean by get the maximum value of the second row when there is just 1 element in each row?

– Nicholas K
Nov 28 '18 at 18:15

add a comment |

-1

I have a 2D String array and I'd like to print and get the maximum value of the second row. I've searched for methods to get the maximum value of each row but it's not working.

Here's what I have so far:

    String stringArray = new String[6][1];  



    for (int i = 0; i < stringArray.length; i++){        

        double max = Integer.MIN_VALUE;



        System.out.println();



        for (int j = 0; j < stringArray[i].length; j++){                   



            System.out.print("Value " + (i + 1) + "t");               



            stringArray[1][j] = String.valueOf(Math.random());



            System.out.print(stringArray[1][j] + "t");  



            if (Integer.parseInt(stringArray[1][j]) > max){

                max = Double.parseDouble(stringArray[1][j]);                    

            }                   

        }



        System.out.println();  // to print in matrix format



        System.out.println("n Max value is " + max);

    }

I tried to change the i's and j's and got nothing. The result is so weird (and wrong), probably because it's together with the print matrix format.

Suggestions?

asked Nov 28 '18 at 17:57

Marcelo

291

1

new String[6][1] - technically it is a 1D array.

– user7
Nov 28 '18 at 18:00

Have you tried using .length?

– Frontear
Nov 28 '18 at 18:01

Why stringArray[1][j]? Change it to stringArray[i][j]

– forpas
Nov 28 '18 at 18:01

2

Integer.parseInt will not work here as Math.random() returns a double. What is your intention here?

– user7
Nov 28 '18 at 18:01

As per this statement String stringArray = new String[6][1]; you will have 6 rows with 1 column -- What do you mean by get the maximum value of the second row when there is just 1 element in each row?

– Nicholas K
Nov 28 '18 at 18:15

add a comment |

-1

I have a 2D String array and I'd like to print and get the maximum value of the second row. I've searched for methods to get the maximum value of each row but it's not working.

Here's what I have so far:

    String stringArray = new String[6][1];  



    for (int i = 0; i < stringArray.length; i++){        

        double max = Integer.MIN_VALUE;



        System.out.println();



        for (int j = 0; j < stringArray[i].length; j++){                   



            System.out.print("Value " + (i + 1) + "t");               



            stringArray[1][j] = String.valueOf(Math.random());



            System.out.print(stringArray[1][j] + "t");  



            if (Integer.parseInt(stringArray[1][j]) > max){

                max = Double.parseDouble(stringArray[1][j]);                    

            }                   

        }



        System.out.println();  // to print in matrix format



        System.out.println("n Max value is " + max);

    }

I tried to change the i's and j's and got nothing. The result is so weird (and wrong), probably because it's together with the print matrix format.

Suggestions?

asked Nov 28 '18 at 17:57

Marcelo

291

I have a 2D String array and I'd like to print and get the maximum value of the second row. I've searched for methods to get the maximum value of each row but it's not working.

Here's what I have so far:

    String stringArray = new String[6][1];  



    for (int i = 0; i < stringArray.length; i++){        

        double max = Integer.MIN_VALUE;



        System.out.println();



        for (int j = 0; j < stringArray[i].length; j++){                   



            System.out.print("Value " + (i + 1) + "t");               



            stringArray[1][j] = String.valueOf(Math.random());



            System.out.print(stringArray[1][j] + "t");  



            if (Integer.parseInt(stringArray[1][j]) > max){

                max = Double.parseDouble(stringArray[1][j]);                    

            }                   

        }



        System.out.println();  // to print in matrix format



        System.out.println("n Max value is " + max);

    }

I tried to change the i's and j's and got nothing. The result is so weird (and wrong), probably because it's together with the print matrix format.

Suggestions?

java arrays max

asked Nov 28 '18 at 17:57

Marcelo

291

asked Nov 28 '18 at 17:57

Marcelo

291

asked Nov 28 '18 at 17:57

Marcelo

291

asked Nov 28 '18 at 17:57

Marcelo

291

asked Nov 28 '18 at 17:57

Marcelo

291

1

new String[6][1] - technically it is a 1D array.

– user7
Nov 28 '18 at 18:00

Have you tried using .length?

– Frontear
Nov 28 '18 at 18:01

Why stringArray[1][j]? Change it to stringArray[i][j]

– forpas
Nov 28 '18 at 18:01

2

Integer.parseInt will not work here as Math.random() returns a double. What is your intention here?

– user7
Nov 28 '18 at 18:01

As per this statement String stringArray = new String[6][1]; you will have 6 rows with 1 column -- What do you mean by get the maximum value of the second row when there is just 1 element in each row?

– Nicholas K
Nov 28 '18 at 18:15

add a comment |

1

new String[6][1] - technically it is a 1D array.

– user7
Nov 28 '18 at 18:00

Have you tried using .length?

– Frontear
Nov 28 '18 at 18:01

Why stringArray[1][j]? Change it to stringArray[i][j]

– forpas
Nov 28 '18 at 18:01

2

Integer.parseInt will not work here as Math.random() returns a double. What is your intention here?

– user7
Nov 28 '18 at 18:01

As per this statement String stringArray = new String[6][1]; you will have 6 rows with 1 column -- What do you mean by get the maximum value of the second row when there is just 1 element in each row?

– Nicholas K
Nov 28 '18 at 18:15

new String[6][1] - technically it is a 1D array.

– user7
Nov 28 '18 at 18:00

Have you tried using .length?

– Frontear
Nov 28 '18 at 18:01

Why stringArray[1][j]? Change it to stringArray[i][j]

– forpas
Nov 28 '18 at 18:01

Integer.parseInt will not work here as Math.random() returns a double. What is your intention here?

– user7
Nov 28 '18 at 18:01

As per this statement String stringArray = new String[6][1]; you will have 6 rows with 1 column -- What do you mean by get the maximum value of the second row when there is just 1 element in each row?

– Nicholas K
Nov 28 '18 at 18:15

add a comment |

1 Answer
1

active

oldest

votes

To find max value in a second dimention you must compare [i][j], not [1][j]

for (int i = 0; i < stringArray.length; i++) {

    int max = Integer.MIN_VALUE;

    for (int j = 0; j < stringArray[i].length; j++) {

        int d = Integer.parseInt(stringArray[i][j]);

        if (d > max) {

            max = d;

        }

    }

    System.out.println("Max row " + i + " value is " + max);

}

Do note that this will print MIN_VALUE for empty array. For

String stringArray = {{"1", "2", "4"}, {"0", "3", "-1"}};

you will get:

Max row 0 value is 4

Max row 1 value is 3

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

To find max value in a second dimention you must compare [i][j], not [1][j]

for (int i = 0; i < stringArray.length; i++) {

    int max = Integer.MIN_VALUE;

    for (int j = 0; j < stringArray[i].length; j++) {

        int d = Integer.parseInt(stringArray[i][j]);

        if (d > max) {

            max = d;

        }

    }

    System.out.println("Max row " + i + " value is " + max);

}

Do note that this will print MIN_VALUE for empty array. For

String stringArray = {{"1", "2", "4"}, {"0", "3", "-1"}};

you will get:

Max row 0 value is 4

Max row 1 value is 3

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

add a comment |

To find max value in a second dimention you must compare [i][j], not [1][j]

for (int i = 0; i < stringArray.length; i++) {

    int max = Integer.MIN_VALUE;

    for (int j = 0; j < stringArray[i].length; j++) {

        int d = Integer.parseInt(stringArray[i][j]);

        if (d > max) {

            max = d;

        }

    }

    System.out.println("Max row " + i + " value is " + max);

}

Do note that this will print MIN_VALUE for empty array. For

String stringArray = {{"1", "2", "4"}, {"0", "3", "-1"}};

you will get:

Max row 0 value is 4

Max row 1 value is 3

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

add a comment |

To find max value in a second dimention you must compare [i][j], not [1][j]

for (int i = 0; i < stringArray.length; i++) {

    int max = Integer.MIN_VALUE;

    for (int j = 0; j < stringArray[i].length; j++) {

        int d = Integer.parseInt(stringArray[i][j]);

        if (d > max) {

            max = d;

        }

    }

    System.out.println("Max row " + i + " value is " + max);

}

Do note that this will print MIN_VALUE for empty array. For

String stringArray = {{"1", "2", "4"}, {"0", "3", "-1"}};

you will get:

Max row 0 value is 4

Max row 1 value is 3

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

To find max value in a second dimention you must compare [i][j], not [1][j]

for (int i = 0; i < stringArray.length; i++) {

    int max = Integer.MIN_VALUE;

    for (int j = 0; j < stringArray[i].length; j++) {

        int d = Integer.parseInt(stringArray[i][j]);

        if (d > max) {

            max = d;

        }

    }

    System.out.println("Max row " + i + " value is " + max);

}

Do note that this will print MIN_VALUE for empty array. For

String stringArray = {{"1", "2", "4"}, {"0", "3", "-1"}};

you will get:

Max row 0 value is 4

Max row 1 value is 3

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

answered Nov 28 '18 at 18:06

Karol Dowbecki

25.5k93759

add a comment |

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