JAVA's one-dimensional array, two-dimensional array, three-dimensional array, multi-dimensional array, etc ., Multidimensional

JAVA's one-dimensional array, two-dimensional array, three-dimensional array, multi-dimensional array, etc ., Multidimensional

This array can be seen as a beginner's learning. From a one-dimensional array to a multi-dimensional array, it is actually very simple. As we all know, one-dimensional and two-dimensional arrays may often be used, it should be rare to use two or more dimensions.

Public class test {public static void main (String [] args) {/* One-dimensional array */int num [] = {0, 1, 2};/* output three rows of data below, 0 ~ 2 */for (int I = 0; I <num. length; I ++) {System. out. println ("output value of one-dimensional array:" + num [I]);} System. out. println ("~~~~~~~~~~~~~~~~~~~~~~~ ");//(!) Does it seem simple and clear? Then let's look at the two-dimensional array int num1 [] [] = {0, 1, 2}, {3, 4}, {5}; // note: in fact, you can think of it as rows and columns for (int I = 0; I <num1.length; I ++) {System. out. print ("two-dimensional array output value:"); for (int j = 0; j <num1 [I]. length; j ++) {System. out. print ("" + num1 [I] [j]); // num1 [I] [j] I only describe the first line, for example, num1 [0] [1] is the {0, 1, 2} object in num1 [0.} System. out. println ();} System. out. println ("~~~~~~~~~~~~~~~~~~~~~~~ ");//(!) Are you confused about this? Come on! Next, let's look at the 3D array. Int num2 [] [] [] ={{ 0, 1, 2 },{ },{ 6 },{ 7, 8 },{ 9 }}, {10, 11 }}; for (int I = 0; I <num2.length; I ++) {System. out. print ("3D array output value:"); for (int j = 0; j <num2 [I]. length; j ++) {for (int k = 0; k <num2 [I] [j]. length; k ++) {System. out. print ("" + num2 [I] [j] [k]) ;}} System. out. println ();} System. out. println ("~~~~~~~~~~~~~~~~~~~~~~~ ");//(!) You have seen 3D, right? Or what rules have you caught? Come! Come! Again, the four-dimensional array int num3 [] [] [] [] ={{{ 0, 1, 2}, {3, 4, 5, 6 }},{{ 7, 8, 9 },{ 10, 11, 12, 13, 14 }}}; // assign or replace a value to the number in the array // example: num3 [1] [0] [0] [1] = 404; // Replace the 8 Initial Value with 404 for (int I = 0; I <num3.length; I ++) {System. out. print ("four-dimensional array output value:"); for (int j = 0; j <num3 [I]. length; j ++) {for (int k = 0; k <num3 [I] [j]. length; k ++) {for (int l = 0; l <num3 [I] [j] [k]. length; l ++) {System. out. print ("" + num3 [I] [j] [k] [l]) ;}} System. out. println ();}}}
// Likewise
//......

Console output:

Output value of one-dimensional array: 0 output value of one-dimensional array: 1 Output value of one-dimensional array: 2 ~~~~~~~~~~~~~~~~~~~~~~~ Two-dimensional array output value: 0 1 2 two-dimensional array output value: 3 4 two-dimensional array output value: 5 ~~~~~~~~~~~~~~~~~~~~~~~ 3D array output value: 0 1 2 4 5 3D array output value: 6 7 8 9 3D array output value: 10 11 ~~~~~~~~~~~~~~~~~~~~~~~ Four-Dimensional array output value: 0 1 2 3 4 5 6 four-dimensional array output value: 7 404 9 10 11 12 13 14