How to use loop to generate random strings until certain criteria achieved? [duplicate]

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• How do I compare strings in Java? 23 answers

I'm trying to create two string arrays randomiser that will loop until both of the arrays reach same output.

I've tried the code below, but the output didn't randomise:

    int suitRandom = gen.nextInt(4);
    int valueRandom = gen.nextInt(13);
    String Card1 = arrayValue[valueRandom] + arraySuit[suitRandom];

    int suitRandom2 = gen.nextInt(4);
    int valueRandom2 = gen.nextInt(13);
    String Card2 = arrayValue[valueRandom2] + arraySuit[suitRandom2];

    while (Card1 != Card2){
    System.out.println("Card 1: " + Card1);
    System.out.println("Card 2: " + Card2);
        if (Card1 == Card2){
        System.out.println("Win");
        }
        else{
        System.out.println("Lose");
        }

I expect that the loop will generate random output and until the output of Card1 equal to Card2.

Can somebody please help? Thanks in advance!