Separating a String with index of

Question

I'm trying to take one whole string, and print each section of it differently using index of. I've been trying something like this...

String example = "one, two, three, four"
int comma = example.indexOf(',' , 0);
    String output = example.substring(comma);
    System.out.println(output);

This prints

,two,three,four

I can't get it to do anything else...

Answer 1

Only using indexOf method with loop you can print all separate String separated by comma ,. You don't need split regex. Look at following example.

    String str = "one, two, three, four";
    int lastIndex = 0;
    int firstIndex=0;
    while (lastIndex != -1) {

        lastIndex = str.indexOf(',', lastIndex);

        if (lastIndex != -1) {
            System.out.print(str.substring(firstIndex, lastIndex));

            if(lastIndex==str.lastIndexOf(',')){
            System.out.print(str.substring(lastIndex));
            }
            lastIndex += 1;
        }

        firstIndex=lastIndex;
    }
    System.out.println();

Output: one two three four

Answer 2

try this:

String example = "one, two, three, four";

for (int i = example.indexOf(", "); i != -1; i = example.indexOf(", ")) {
    System.out.println(example.substring(0, i));
    example = example.substring(i + 2);
}
System.out.println(example);

if you like recursion:

public static void main(String[] args) {
    String example = "one, two, three, four";
    printSections(example);
}

public static void printSections(String word) {
    int i = word.indexOf(", ");
    if (i == -1) System.out.println(word);
    else {
        System.out.println(word.substring(0, i));
        printSections(word.substring(i + 2));
    }
}

Answer 3

Why dont you try with split()?

String example = "one, two, three, four"
String[] temp = example.split(",");
for(int i=0;i<temp.length; i++){
System.out.println(temp[i]);
}

Answer 4

There is a handy method in String class. Sting#split.

You just split your string with comma, that is all what you need.

String example = "one, two, three, four";
String[] split = example.split(",");
for (String string : split) {
    System.out.println(string);
}

split method returns the array of separated and string's and we just need to print them.

Side note: I used Enhanced for loop to iterate

Answer 5

do like this

String example = "one, two, three, four"
String[] output = example.split(',');
for(String s:output){  
    System.out.println(s);
}

Answer 6

Use Split

String example = "one, two, three, four";
    for(String i:example.split(",")){
        System.out.println(i);

    }

Using IndexOf

    String example = "one, two, three, four";
    String output;
    String temp = example;
    int gIndex = 0;
    int len = example.length();
    example += ",";
    for(int i=0 ; i<len;i+=gIndex+1){
        gIndex = example.indexOf(",");
        output = example.substring(0,gIndex);
        System.out.println(output);
        example = example.replace(output, "").replaceFirst(",", "");
    }
    example = temp;