如何将段落分为多行60个字符

Question

I'm new to Coding area I apologize if this Question might have asked previously. I'm Trying to Achieve like this . Suppose i have a Paragraph or Line which is more than 64 characters like this I've been using the Lumia 822 for over a month now and I noticed that the moment I reach over 70 characters

At 60th Character we have word noticed so it should be pushed to next line. Expected output.

I've been using the Lumia 822 for over a month now and I noticed that the moment I reach over 70 characters

Could you please help me out how to achieve this. I have used String Tokenizer and substr() but didnt worked.

Please give your Valuable Suggestions.

Thanks.

Answer 1

A very simple solution:

public String appendNewLine(String text, int max) {
    int count = 0;
    StringBuilder output = new StringBuilder();
        for (int i = 0; i < text.length(); i++) {
            char c = text.charAt(i);

            if (count >= max && c == ' ') {
                count = 0;
                output.append("\n");
            } else {
                output.append(c);    
            }
            count++;
        } 
    return output.toString();
}

Answer 2

This code will ensure each line is strictly less than or equal to splitLen . Any words coming after will be moved to next line.

You can adjust the line width using splitLen argument. I have tried to cover couple of scenarios. If anything missing, kindly point out.

public String splitString(String s, int splitLen){

    StringBuilder sb = new StringBuilder();
    int splitStart = 0;

    while(splitStart < s.length()){

        int splitEnd = splitStart + splitLen;
        splitEnd = splitEnd > s.length() ? s.length() : splitEnd;   // avoid overflow

        int spaceIndex = s.substring(splitStart, splitEnd)
                    .lastIndexOf(" ");

        // look for lasts space in line, except for last line
        if(spaceIndex != -1 && splitEnd != s.length()){
            splitEnd = splitStart + spaceIndex;
        }
        // else (no space in line), split word in two lines..

        sb.append(s.substring(splitStart, splitEnd))
            .append(System.lineSeparator());

        // if ends with space, skip space in next line
        splitStart = splitEnd + (spaceIndex != -1 ? 1 : 0); 
    }

    return(sb.toString());
}