What will be the output of following program, if compiled and run using below command:
java Split1 a1+b3-c5=4x [12345][+-=]

public class Split1 {
    public static void main(String[] args){
        System.out.println((args[0].split(args[1])).length);
    }
}
Explanation
The split command applied to args[0] (a1+b3-c5=4x) string uses arg[1] ([12345][+-=]) as a regexp argument for splitting the string. The regexp expression reads as "any number in 1 2 3 4 5 followed by '+' '-' or '=' symbol" The result will be a String array {"a", "b","c","4x"} whose length is, obviously, 4.
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