如何在Java中使用split从字符串中获取值

Question

I have a string having key and value:

A=1,B=2,C=3,D=4,E=5

I need a split regex in java to get these values (1,2,3,4,5) from above string.

Answer 1

You can use regex with this pattern [0-9]+

Example:

    String toIndex = "A=1,B=2,C=3,D=4,E=5";
    Pattern p = Pattern.compile("[0-9]+");
    Matcher m = p.matcher(toIndex);
    while (m.find()) {
        System.out.println(m.group());
    }

and in the while instead of printing the groups add then to a list or similar for latter manipulation

Answer 2

use this:

    String s = "A=1,B=2,C=3,D=4,E=5";
    Pattern p = Pattern.compile("=(\\d+)");

    Matcher m = p.matcher(s);
    while (m.find()) {
        System.out.println(m.group(1));
    }

\\d+ is for one until n digits

Answer 3

Since you asked to use split, this will work as well.

    String str2 = "A=1,B=2,C=3,D=4,E=5";
    String [] between = str2.split("=+|,");
    for(int i=1; i<between.length; i+=2){
        System.out.println(between[i]);
    }

Works for both strings and numbers between = and ,

(A=AA,B=BB,C=CC,D=DD,E=EE)