How can I keep randomizing a text in Java?

I just want to know, maybe you can help me. Heres the code,maybe you can edit it.

import java.util.Scanner;
public ststic void main string(args[]){
    System.out.println("I want to keep randomize between  following texts:")
    //abc_123_def
    //jaofn_3vfdsa
    //nabdoew-8943
}