所以我在課堂上寫了一個嵌套的while循環(huán)來計算z的值。我需要輸出 z 和獲取它所需的時間。這是結(jié)果public class TimeWhile {public static void main(String[] args) {    int n = 100000;    int z = 1;    long startTime = System.currentTimeMillis();    int x = 0;    while (x <= n) {        int y = 0;        while (y <= n) {            z = x * y;            y++;        }        x++;    }    long endTime = System.currentTimeMillis();    long elapsed = endTime - startTime;    System.out.println("The time is " + elapsed);    System.out.println("The number is " + z);}}第二個while循環(huán)public class TimeWhile {public static void main(String[] args) {    int n = 100000;    int z = 1;    long startTime = System.currentTimeMillis();    int x = 0;    int y = 0;    while (x <= n) {        while (y <= n) {            z = x * y;            x++;            y++;            }    }    long endTime = System.currentTimeMillis();    long elapsed = endTime - startTime;    System.out.println("The time is " + elapsed);    System.out.println("The number is " + z);}}為什么第二個跑得更快？輸出“z”是相同的。