Formatting strings in JAVA with Android Studio

Question

I am trying to format a specific string. I had the unfortunate event of my laptop crashing on me the other day, taking away with it lots of valuable code. I did save most of the files, but the few that weren't saved were crucial to my android app. Well Here is my code that tries to format a string. I need all the numbers at the beginning of each line to go away. there are about 3600 of them.

//inside onCreate method
String string = "3    import android.animation.Animator; \n" +
"4    import android.animation.AnimatorListenerAdapter; \n" +
"5    import android.animation.ValueAnimator; \n" +
"6    import android.app.Activity; \n" +
"7    import android.content.Context; \n" +
"8    import android.content.DialogInterface; \n";

char[] ch = string.toCharArray();
    char c ='M';


    for(int i=4;i<ch.length;i++){
        boolean b1 = false;
        boolean b2 = false;
        boolean b3 = false;
        boolean b4 = false;
        c = ch[i];
        if((c >= '0' && c <= '9') && (ch[i-1]=='\n')){
            b1 = true;

            if((ch[i+1] >= '0' && ch[i+1] <= '9'))b2=true;

            if((ch[i+2] >= '0' && ch[i+2] <= '9'))b3=true;}

        if(b1)ch[i]='Q';
        if(b2)ch[i+1]='Q';
        if(b3)ch[i+2]='Q';

        b1 = false;
        b2 = false;
        b3 = false;
    }

    String strings = ch.toString();
    strings.replace("Q","");

    Log.d("meoww","juy "+strings);

As you can see, the for loop tries to get rid of these numbers for me. The logs show the following output:

juy [C@3d03b1f5

I know its probably a minor error, but how can I correct this. Like I say, I will have to do this about 3600 inside this for loop.

thanks for any suggestions,

Keep on coding

If it's showing something like [C@3d03b1f5 that means it's displaying the address of the object and not the contents inside...just saying — gabbar0x
– gabbar0x, Commented Aug 18, 2016 at 5:49
Try String strings = new String(ch); instead of String strings = ch.toString(); — Neerajlal K
– Neerajlal K, Commented Aug 18, 2016 at 6:07

Scary Wombat · Accepted Answer · 2016-08-18 06:05:05Z

1

This code

String.replaceAll ("^\d*\s", " ") this will take numbers at the beginning of the line ^ following by one of more digit \d* followed by a space and replace this with a space

answered Aug 18, 2016 at 6:05

Scary Wombat

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1 Comment

i_o Over a year ago

This probably will do the trick. I will upvote it as soon as i test it out. Hope it doesn't remove crital numbers used in array or for loop construction. @Scary Wombat

Vygintas B · Accepted Answer · 2016-08-18 05:56:48Z

0

try this: String str = string.replaceAll("[0-9]","");

This will remove all digits.

answered Aug 18, 2016 at 5:56

Vygintas B

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3 Comments

Sandeep Kokate Over a year ago

It will remove all digits from the strings, so may it remove any digit present in the code also???

Vygintas B Over a year ago

It will replace all digits from String with empty values. So yes.

i_o Over a year ago

I cant have the digits that are used in new arrays, for loops and alpha-numeric variable names removed. @Vygintas B

Sandeep Kokate · Accepted Answer · 2016-08-18 06:14:23Z

Try with this:

public static void main(String[] args)
      {// inside onCreate method
        String string = "3    import android.animation.Animator; \n"
            + "4    import android.animation.AnimatorListenerAdapter; \n"
            + "5    import android.animation.ValueAnimator; \n" + "6    import android.app.Activity; \n"
            + "7    import android.content.Context; \n" + "8    import android.content.DialogInterface; \n"
            + "17    import android.content.Context; \n" + "558    import android.content.DialogInterface; \n";

        char[] ch = string.toCharArray();
        if(ch[0] > '0' && ch[0] < '9'){
          ch[0] = ' ';
        }
        for (int i = 0; i < ch.length; i++)
        {
          if (ch[i] == '\n')
          {
            int count = i + 1;
            if (count < ch.length)
            {
              while (count < ch.length && ch[count] >= '0' && ch[count] <= '9')
              {
                ch[count] = ' ';
                count++;
              }
            }
          }
        }

        String strings = new String(ch);

        System.out.println(strings);
      }

This code will replace number at first position of each line with space. After this you can apply eclipse formatter to remove unnecessary spaces.

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