how to shuffle a letters of array in android?

Question

String arrAnimal[] = {"cat","dog","parrot","fish"};

I need to shuffle each word and set it to TextView, when click button wanna go through each element(see Shuffeled elements).

Answer 1

Complete working code,

String[] animals = {"cat","dog","parrot","fish"};
for (int i = 0; i < animals.length; ++i) {
    List<Character> letters = new ArrayList<>(animals[i].length());
    for (char c : animals[i].toCharArray()) {
        letters.add(c);
    }
    Collections.shuffle(letters);
    StringBuilder builder = new StringBuilder();
    for (char c : letters) {
        builder.append(c);
    }
    animals[i] = builder.toString();
}
System.out.println(Arrays.toString(animals));

Outputs: [tca, ogd, roptar, sifh]

EDIT: To print line by line, change the last line to,

for (String s : animals) {
    System.out.println(s);
}