Java Elegant splitting String by array

Question

Have you any idea about elegant splitting input String by String Array?

For example:

1. We have splitter array with String elements

   ["=",",=","<=",">=","<",">"]

2. We have an expression

   "44+22<=x+y>=2x+4r>34"

The result should be:

["44+22","x+y", "2x+4r","34"]

Answer 1

Use the regex, (\\<\\=)|(\\>\\=)|(\\>) where | is used as or .

import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        String exp = "44+22<=x+y>=2x+4r>34";
        String[] arr = exp.split("(\\<\\=)|(\\>\\=)|(\\>)");
        System.out.println(Arrays.toString(arr));
    }
}

Output:

[44+22, x+y, 2x+4r, 34]