Java displaying array one by one by using indexes

Question

I am having trouble displaying an array by index, I don't know why this is happening. Any help will be greatly appreciated. Here is a snippet of my code:

// create token2
    String token2 = "";

    // create Scanner inFile2
    Scanner inFile2 = new Scanner(new File
    ("/Users/timothylee/KeyWestHumid.txt")).
            useDelimiter(",\\s*");

    // create temps2
    List<String> temps2 = new LinkedList<String>();

    // while loop
    while(inFile2.hasNext()){

        // find next
        token2 = inFile2.next();

        // initialize temps2
        temps2.add(token2);
    }

    // close inFile2
    inFile2.close();

    // create array
    String[] tempsArray2 = temps2.toArray(new String[0]);

    // for-each loop
    for(String ss : tempsArray2){

        // display ss
        System.out.println(tempsArray2[0]);
    }

I am having trouble displaying an array by index, I don't know why this is happening. What's the trouble, what's the display, and what is happening? — Paul Samsotha
– Paul Samsotha, Commented Nov 8, 2013 at 2:38
What are you trying to accomplish here? Your code simply makes no sense. — PM 77-1
– PM 77-1, Commented Nov 8, 2013 at 2:39
Here is an answer that may be useful in helping you traverse your linked list: stackoverflow.com/a/10167545/772020 — rdonatoiop
– rdonatoiop, Commented Nov 8, 2013 at 2:42

panini · Accepted Answer · 2013-11-08 02:38:54Z

1

// for-each loop
for(String ss : tempsArray2){

    // display ss
    System.out.println(tempsArray2[0]);

your problem is here. you're not actually using the ss variable at all, you're simply displaying the first string each time around the loop.

answered Nov 8, 2013 at 2:38

panini

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1 Comment

Paul Samsotha Over a year ago

@user2967353, if you're tyring to use an enhanced for loop, you should learn how to use it correctly.

shawnzhu · Accepted Answer · 2013-11-08 02:39:20Z

1

improve your for loop:

// for-each loop
for(int i=0;i<tempsArray2.length;i++){
    // display ss
    System.out.println(tempsArray2[i]);
}

If you prefer for-each:

// for-each loop
for(String ss : tempsArray2){

    // display ss
    System.out.println(ss);
}

answered Nov 8, 2013 at 2:39

shawnzhu

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1 Comment

Paul Samsotha Over a year ago

I would suggest the first way, since OP seems to not know how to use enhanced for loops.

Juned Ahsan · Accepted Answer · 2013-11-08 02:41:54Z

0

You have put in your enhanced for loop correctly, its only the items you are not picking properly. Using enhanced for loop loop allows you to pick items without using indexes.

Change your loop from

// for-each loop
    for(String ss : tempsArray2){

        // display ss
        System.out.println(tempsArray2[0]);
    }

to

// for-each loop
    for(String ss : tempsArray2){

        // display ss
        System.out.println(ss);
    }

answered Nov 8, 2013 at 2:41

Juned Ahsan

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