Extracting ints within a String with digits and letters

Question

protected void intFinder(int k, String inputLine) {
        int legnth = inputLine.length();
        Integer extractedNumber = null;
        for (int i = 0; i < legnth; i++) {
            Character character = inputLine.charAt(i);
            if (character.equals(":")) {
                i++;
                extractedNumber += character;
                character = inputLine.charAt(i);
            } else if (character.equals(",")) {
                i++;
                character = inputLine.charAt(i);
                while (Character.isDigit(character)) {
                    extractedNumber += character;
                    i++;
                    character = inputLine.charAt(i);
                }

            //code ommited 

I'm trying to 3 ints out of a String that is a mix of letters and digits for example avfds:10,5,14 but if character.equals(":") is never showing as true and im not sure why. Thanks for any help

int k is used later in a switch shouldn't be relevant at this point

Answer 1

使用字符时，请尝试使用简单的引号（'）而不是双引号（“）

Answer 2

for (String s : "avfds:10,5,14".split(":")[1].split(","))
    System.out.println(s);

output:

10
5
14

or:

System.out.println(Arrays.asList("avfds:10,5,14".split(":")[1].split(",")));

output:

[10, 5, 14]

Answer 3

With some guava :

package com.stackoverflow.so20477116;

import com.google.common.base.CharMatcher;
import com.google.common.base.Function;
import com.google.common.base.Splitter;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;

import java.util.List;

public class Extract {

    private static final Splitter SPLITTER = Splitter.on(CharMatcher.JAVA_DIGIT.negate()).omitEmptyStrings();

    public static void main(final String[] args)
    {
        final List<Integer> result = Lists.newArrayList(Iterables.transform(SPLITTER.split("avfds:10,5,14"), ToInt.INSTANCE));
        System.out.println(result); // [10, 5, 14]
    }

    // String => Integer
    private static enum ToInt implements Function<String, Integer> {
        INSTANCE;

        @Override
        public Integer apply(final String input)
        {
            return input == null ? null : Ints.tryParse(input);
        }
    }
}

References:

• Guava's string utilities, explained
• Splitter javadoc
• CharMatcher javadoc