Please provide the program. The function is to get the running duration of "a piece of program code" and provide the program code

Please provide the program. The function is to get the running duration of "a piece of program code" and provide the program code

One day I saw a few java questions, so I wrote a little bit. I just went straight to the code.

3. Known int-type array arr [t],

Please: ① print the array. The output format is [arr1, arr2, arr3,...].

② The maximum and minimum values of the output array are min.

③ Sort the array by Bubble sorting and print the sorted array.

4. Provide a program. The function is to obtain the running duration of a piece of program code. Requirements:

① The program framework is defined in the parent class.

② "A piece of program code" is given in the subclass and overwrites the corresponding method in the parent class.

③ "A piece of program code": print a graph composed of "*", as shown in figure 1.

Figure 1

Question 3:

Public class testArr {public static void main (String [] arg) {int [] arr = {,}; System. out. println ("print out array:"); System. out. print ("["); for (int I = 0; I <arr. length; I ++) {System. out. print (arr [I] + ",");} System. out. print ("]"); System. out. println ("\ n" + "maximum value:" + getMax (arr); System. out. println ("minimum value:" + getMin (arr); arrSort (arr);} public static int getMax (int [] arr) {int max = Integer. MIN_VALUE; for (int I = 0; I <arr. length; I ++) {if (arr [I]> max) max = arr [I];} return max;} public static int getMin (int [] arr) {int min = Integer. MAX_VALUE; for (int I = 0; I <arr. length; I ++) {if (arr [I] <min) min = arr [I];} return min;} public static int arrSort (int [] arr) {for (int I = arr. length-1; I> = 0; I --) {for (int j = 0; j <I; j ++) {if (arr [j]> arr [j + 1]) {int temp = arr [j]; arr [j] = arr [j + 1]; arr [j + 1] = temp ;}} System. out. println ("Bubble sorting result:"); System. out. print ("["); for (int I = 0; I <arr. length; I ++) {System. out. print (arr [I] + ",");} System. out. print ("]"); return 0 ;}}
Running result:

Question 4:

Public class Diamond {public static void main (String [] args) {long startTime = System. currentTimeMillis (); oneCode (); long endTime = System. currentTimeMillis (); System. out. print ("\ n" + "program running time:" + (endTime-startTime) + "ms");} public static void oneCode () {for (int I = 1; I <5; I ++) {for (int j = 1; j <I + 4; j ++) {for (int t = 0; t <I; t ++) {if (j = (5-i + 2 * t) {System. out. print ("*") ;}} System. out. print ("");} System. out. print ("\ n ");}}}