Java Program to Print Matrix in Z Form

In this section, we will discuss how to print the matrix in Z form. Also, we will create a Java program that prints the all the Z elements of the matrix.

The Z form includes the elements of the first row, right diagonal, and the last row of the matrix. To print the Z form of the matrix, the rows and columns must be the same.

MatrixZForm.java

import java.util.Scanner;
public class MatrixZForm
{
//function to print the matrix
static void printMatrix(int arr[][])
{
int row, col;
//loop for rows
for(row=0; row<3;row++)
{
System.out.print("\n");
//loop for columns
for(col=0; col<3;col++)
{
//prints elements     
System.out.print(arr[row][col]+"\t");
}
}
}
//looks for the highest occurrence of 1
static void printZMatrix(int arr[][])
{
int row, col;
//print the first row (first elements of all the columns) of the matrix
for(col=0;col<3;col++)
System.out.print(arr[0][col]+"\t");
System.out.print("\n");        
//prints the right diagonal of the matrix
//row starts from indexing 1 because we have not to print the first and the last element 
for(row=1; row<2; row++)
for(col=0;col<3;col++)
//checks if the sum of rows and columns index is equal to 2 or not
//if equal prints the mid element of the first row and first column
if(row+col==2)
System.out.print("\t"+arr[row][col]);
System.out.print("\n");
//print the last row of the matrix
for(col=0;col<3;col++)
System.out.print(arr[2][col]+"\t");
}
//driver code
public static void main(String args[])
{
//initializing a 3*3 matrix 
int arr[][] = {{5,9,1},{3,6,7},{4,8,0}};
System.out.print("The matrix elements are:");
//function calling
printMatrix(arr);
System.out.println("\nThe z-form of the matrix is: ");
//function calling
printZMatrix(arr);
}
} 

Output:

In the following program, we have printed the elements of the matrix in an array that forms a Z pattern.

MatrixZElements.java

import java.lang.*; 
import java.io.*; 
public class MatrixZElements
{
//function to prints the matrix in Z form    
public static void diag(int arr[][], int n) 
{ 
int i = 0, j, k; 
//prints the first row of the matrix
for (j = 0; j < n - 1; j++) 
{
System.out.print(arr[i][j] + " "); 
} 
//prints the right diagonal of the matrix
k = 1; 
for (i = 0; i < n - 1; i++) 
{ 
for (j = 0; j < n; j++) 
{ 
if (j == n - k) 
{ 
System.out.print(arr[i][j] + " "); 
break; 
} 
} 
k++; 
} 
//prints the last row of the matrix
i = n - 1; 
for (j = 0; j < n; j++) 
System.out.print(arr[i][j] + " "); 
System.out.print(""); 
} 
public static void main(String args[]) 
{ 
//initializing a 4*4 matrix    
int a[][] = { { 11, 23, 9, 34 }, { 67, 25, 67, 45 }, { 77, 38, 30, 90 }, { 71, 91, 56, 88 } }; 
System.out.println("Z elements of the matrix are: ");
//calling function 
diag(a, 4); 
} 
}

Output:

Z elements of the matrix are: 
11 23 9 34 67 38 71 91 56 88

Next TopicVertical Order Traversal of a Binary Tree in Java

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