2D Array applied operator & efficient menu set up - Java

2D Array 

Users can receive and choose a number from a menu bar by using the array in java, especially in this post since we are going to deal with two-dimensional arrays to prevent a redundant usage of choice and help make an efficient choice of selection from the user. 

 

                                        

if we put a menu below then we can make the list of the menu like a red box.

10- {"EXIT", "프로그램을 종료합니다."}

11- {"Main", "연산하기", "끝내기"},

12- {"연산", "새로운 연산", "이어서 연산", "이전 화면"}

To use of 2d array (two-dimensional array) we need to understand the basic concept of an Array.

1st length of the array is determined by the number of indexes

2nd index is the asset of the array. 

so the total number of indexes is the same as the length of the array. 

Here is the formula to explain above the logic with the java formula

String [ ] [ ]      menu       = {  { "EXIT", "프로그램을 종료합니다.~" }, 

random name { "MAIN", "연산하기", "끝내기" },

{ "연산", "새로운 연산", "이어서 연산", "이전 화면" } };

String [0] [A] = Asset 1

String [1] [B] = Asset 2  

String [2] [B] = Asset 3

Column  first, row later 

 

table	A	B	C
0	Asset1	Asset7	Asset13
1	Asset2	Asset8	Asset14
2	Asset3	Asset9	Asset15
3	Asset4	Asset10	Asset16
4	Asset5	Asset11	Asset17
5	Asset6	Asset12	Asset18

                                                                  

 

  

Because we only make up a table (above the red box) with indexes, we need to fill up the first cell among ([][]) with the number 1! 

this.display(title);

this.display(this.makeSubMenu(menu[1]));