WavePrint.java

/*
input: 11 12 13 14 
 21 22 23 24 
 31 32 33 34 
 41 42 43 44 

output: 11 12 13 14 24 23 22 21 31 32 33 34 44 43 42 41 
 */
packageLecture7;

publicclassWavePrint {

publicstaticvoidmain(String[] args) {

// int[][] arr = new int[3][3];
// arr[0][0] = 11;

int[][] arr = { { 11, 12, 13, 14 }, { 21, 22, 23, 24 },
 { 31, 32, 33, 34 }, { 41, 42, 43, 44 } };

display(arr);
System.out.println();

// wave print logic
for (inti = 0; i < arr.length; i++) {
if (i % 2 == 0) {
for (intj = 0; j < arr[i].length; j++) {
System.out.print(arr[i][j] + " ");
 }
 } else {
for (intk = arr[i].length - 1; k >= 0; k--) {
System.out.print(arr[i][k] + " ");
 }
 }
 }
 }

publicstaticvoiddisplay(int[][] arr) {
for (inti = 0; i < arr.length; i++) {
for (intj = 0; j < arr[i].length; j++) {
System.out.print(arr[i][j] + " ");
 }
System.out.println();
 }
 }
}