void transponujPodleVD() {
    for (int j = 0; j < pole.length; j++) {
        for (int i = 0; i < pole.length-j; i++) {
            int pom = pole[i][j];
            pole[i][j] = pole[pole.length-1-j][pole.length-1-i];
            pole[pole.length-1-j][pole.length-1-i] = pom;
        }
    }  
}

Edit:Nechci ti do toho kecat, ale kdyz uz si od MM.. dostal zdarma tu vymenu, tak si mohl samostatne vypotit ten index, do ktereho muzes tu matici prochazet. Jak uz bylo psano, staci si to napsat na papir.

Edit2: MM.., proc me pri cteni vaseho nicku vzdycky napadne MM..Tank?
Edit3: Case Solved -> pivni_MM_Tank