im trying to get the index of a character using only the charAt and length methods for strings

Question

im trying to get the index of a character using only the charAt and length methods for strings. this is what the question asks :Declare a public method called indexOf that takes a character parameter and returns the index in the stored string of the first occurrence of that character or -1 if the character is not found. this is what i did.

public int indexOf(char c){
    for(i=0; i <string.length - 1; i++){
    if(string.charAt(c) == string.charAt(i)){
    return i;
    else {
    return -1;
    }
    }

Please don't just dump your homework here. Show what you've tried and explain any specific problems you've encountered. — tnw, Mar 16 '15 at 19:30
not sure how else to show this code in the block form. not sure how to use this site — moeez malik, Mar 16 '15 at 19:35
Use [edit] option (placed below your question) to add code example. Don't post it in comment since it looses its formatting and becomes unreadable. — Pshemo, Mar 16 '15 at 19:37

score 3 · Answer 1 · answered Mar 16 '15 at 19:34

3

You need a for loop from 0 to length()-1, and test the value equality of charAt(index) with the given character.

answered Mar 16 '15 at 19:34

T.Gounelle

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++ for no-code answer of homework question. – Pshemo Mar 16 '15 at 19:38

score 0 · Answer 2 · answered Mar 16 '15 at 19:37

public static int indexOf(String word, char c) {
    int index = -1;
    for (int i = 0; i < word.length(); i++) {
        if (word.charAt(i) == c){
            index = i;
            break;
        }
    }
    return index;
}

Explanation provided by : @Abbé Résina.

im trying to get the index of a character using only the charAt and length methods for strings

2 Answers2