How do I get values from a textfield and save it in an integer array that later displays it in a label

Question

I have been getting errors with this code my output displays in symbols I am using Java in netbeans gui builder

   String[] stringValues = jTextField1.getText().split("[,]");
        int[] numArray= new int[stringValues.length];

        for(int i=0; i<numArray.length; i++){
        numArray[i]= Integer.parseInt(stringValues[i]);
        }

        String value ="";
        for (int j = 0; j <= numArray.length; j++) {
        value += numArray[j];}
        jLabel1.setText( value.toString() );

what error do you get ? Could you add an exemple of input and output you get and output you expect ? — vincrichaud
– vincrichaud, Commented May 15, 2018 at 10:54
In your second for loop you write j <= numArray.length there you become a IndexOutOfBoundException. Write instead: j < numArray.length — Morchul
– Morchul, Commented May 15, 2018 at 10:58
i want to have a user input 1,2,3,4 and save it into an int array then have the array display in a label 1,2,3,4 — Kimberly
– Kimberly, Commented May 15, 2018 at 11:02

Morchul · Accepted Answer · 2018-05-15 11:13:56Z

2

Try out this:

String[] stringValues = jTextField1.getText().split(",");
//split the input "1,2,3,4" by "," result in array = ["1","2","3","4"]

int[] numArray= new int[stringValues.length];


for(int i=0; i<numArray.length; i++){
    numArray[i]= Integer.parseInt(stringValues[i]);
    //parse every string to int
}

String value ="";
for (int j = 0; j < numArray.length; j++) {
    value += numArray[j] + ",";
    //for each int in numArray ad: "numArray[j],"
}
//result is = "1,2,3,4,"

value = value.substring(0, value.length() - 1);
//remove last unused ","

jLabel1.setText( value );

edited May 15, 2018 at 11:13

answered May 15, 2018 at 11:05

Morchul

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Comments

Jay Dangar · Accepted Answer · 2018-05-15 11:09:51Z

0

change your code from ->

        String[] stringValues = jTextField1.getText().split("[,]");
        int[] numArray= new int[stringValues.length];

        for(int i=0; i<numArray.length; i++){
          numArray[i]= Integer.parseInt(stringValues[i]);
        }

        String value ="";

        for (int j = 0; j <= numArray.length; j++) {
          value += numArray[j];
        }

        jLabel1.setText( value.toString() );

to this ->

    String[] stringValues = jTextField1.getText().split("[,]");
    int[] numArray= new int[stringValues.length];

    for(int i=0; i<numArray.length; i++){
       numArray[i]= Integer.parseInt(stringValues[i]);
    }

    String value = "";

    for (int j = 0; j < numArray.length; j++) {
      value += Integer.toString(numArray[j]) + ",";
    }

    jLabel1.setText(value);

edited May 15, 2018 at 11:09

answered May 15, 2018 at 10:56

Jay Dangar

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9 Comments

vincrichaud Over a year ago

Could you add explanations ? so the OP will understand why his code isn't and why your code is

Jay Dangar Over a year ago

added the explanation of cause of problem and answer as well.

Morchul Over a year ago

I'm not sure he want to see the sum of the values. In his question he says: "in an integer array that later displays it in a label". So I think he want to see the integer array well formated like: 5,4,3,6. But I'm not sure maybe you are right.

vincrichaud Over a year ago

@Kimberly check Morchul comment, that's why you get this error

Jay Dangar Over a year ago

yes, you are right @vincrichaud, and i have changed it in my code.

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