Java循环问题

for (int i = 0; i < array.length; i++) {
    System.out.println(array[i]);
}

int i = 0;
while (i < 10) {
    System.out.println(i);
    i++;
}

int i = 0;
do {
    System.out.println(i);
    i++;
} while (i < 10);