converting char array of particular length into a string

Question

i need to convert char array into string , the problem in doing this is......i need to convert the character in char array of particular length say k to string. ie, char array is "b" .b takes value dynamically.....for instance take as "p,a,p,e,r,s" now k value also dynamic ,for this word "k=5" ,and then only 4 characters in char array "b" should be converted into string...ie the string should print as "paper"........ the code what i have now is

 for(int c=0;c<=k;c++)
 {
      System.out.print(b[c]);
 }
 str=new String(b);
 System.out.println(str);

where b[c] prints correct value(in char array) as "paper". While converting to string str (in program) it prints as "papers" itself....can anyone give me solution for this?

hexacyanide · Accepted Answer · 2013-10-18 04:58:13Z

8

You can use a different constructor of String that lets you specify the array along with the start point and number of characters to use.

In your case, you would try:

str = new String( b, 0, k );

edited Oct 18, 2013 at 4:58

hexacyanide

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answered Oct 18, 2013 at 4:57

Steve

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1 Comment

saranya Over a year ago

thanks for ur code...it worked when i give as str=new Stirng(b,0,k+1);

Se Won Jang · Accepted Answer · 2013-10-18 05:18:57Z

1

char newArr[] = new char[k];
for (int i = 0; i < k; i++) {
    newArr[i] = b[i];
    System.out.print(b[i]); // print until the kth index
}

return new String(newArr);

edited Oct 18, 2013 at 5:18

answered Oct 18, 2013 at 4:57

Se Won Jang

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3 Comments

saranya Over a year ago

thanks for this code.....but i need to print till k value...so i gave "i<=k".....but this is not working....(progarm is not running) .....y this happens so?

Se Won Jang Over a year ago

I've edited my answer. If you want to print until the kth index, then it should be i < k, since JAVA arrays are 0-indexed.

Se Won Jang Over a year ago

For example, if you have the word "papers", and you feed k = 6, it's not gonna run, since there is not index:6 for that string. Index:5 is the last index.

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