58. Merge two array.

class MergeArrayDemo
{
public static void main(String args[])
{
Integer a[]={1,2,3,4};
Integer b[]={5,6,7,0};
Integer[] both = concat(a, b);

System.out.print("\nFirst Array : ");
for(int i=0;i<a.length;i++)
{
System.out.print(a[i]+"\t");
}

System.out.print("\nSecond Array : ");
for(int i=0;i<b.length;i++)
{
System.out.print(b[i]+"\t");
}

System.out.print("\nMerged Array : ");
for(int i=0;i<both.length;i++)
{
System.out.print(both[i]+"\t");
}
}

public static Integer[] concat(Integer[] a, Integer[] b)
{
int aLen = a.length;
int bLen = b.length;
Integer[] c= new Integer[aLen+bLen];
System.arraycopy(a, 0, c, 0, aLen);
System.arraycopy(b, 0, c, aLen, bLen);
return c;
}
}

@java_codings

59. Middle value of an array.

import java.util.*;

class MiddleValue
{
public static void main(String args[])
{
int[] a;
int i, j, n, sum = 0, swap, size;

double t;
Scanner sc = new Scanner(System.in);

System.out.println("Enter size of array");
size = sc.nextInt();

a = new int[size];

System.out.println("Enter numbers ");
for (i = 0; i < size; i++)
{
a[i] = sc.nextInt();
}

System.out.println("Numbers are : ");
for (i = 0; i < size; i++)
{
System.out.print(a[i] + " ");
}

//Sorting
for (i = 0; i < (size - 1); i++)
{
for (j = 0; j < (size - i - 1); j++)
{
if (a[j] > a[j + 1])
{
swap = a[j];
a[j] = a[j + 1];
a[j + 1] = swap;
}
}
}

System.out.println("\nNumbers in sorted order : ");
for (i = 0; i < size; i++)
{
System.out.print(a[i] + " ");
}

//Finding the Middle Value
if (size % 2 == 0)
{
n = (size + 1) / 2;
t = (a[n] + a[n - 1]) / 2.0;
System.out.println("\nMiddle Value is : " + t);
}

else
{
System.out.println("\nMiddle Value is : " + a[size / 2]);
}

}
}

@java_codings

60. Mirror Matrix.

import java.util.*;

class MirrorMatrix
{
public static void main(String[] args)
{
int row, column;
Scanner in = new Scanner(System.in);

System.out.print("Enter number of rows for matrix :");
row = in.nextInt();
System.out.print("Enter number of rows for matrix :");
column = in.nextInt();

int matrix[][] = new int[row][column];

System.out.println("Enter matrix : ");

for (int i = 0; i < row; i++)
{
for (int j = 0; j < column; j++)
{
matrix[i][j] = in.nextInt();
}
}

System.out.println("Mirror matrix : ");

for (int i = 0; i < row; i++)
{
for (int j = column - 1; j >= 0; j--)
{
System.out.print(matrix[i][j] + "\t");
}

System.out.println("");
}
}
}

@java_codings

61. Missing number in an array.

class MissingNumberArray
{
public static int count = 0;
public static int position = 0;
public static boolean flag = false;

public static void main(String[] args)
{
int a[] = {0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 20, 21, 23};

findMissingNumbers(a, position);
}

private static void findMissingNumbers(int a[], int position)
{
if (position == a.length - 1)
return;

for (; position < a[a.length - 1]; position++)
{
if ((a[position] - count) != position)
{
System.out.println("Missing Number: " + (position + count));
flag = true;
count++;
break;
}
}

if (flag)
{
flag = false;
findMissingNumbers(a, position);
}
}
}

@java_codings

62. Multidimensional Array.

class MultiDimArrayExample
{
public static void main(String[] args)
{
String[][] names = {{"Mr. ", "Mrs. ", "Ms. "}, {"Smith", "Jones"}};
// Mr. Smith
System.out.println(names[0][0] + names[1][0]);
// Ms. Jones
System.out.println(names[0][2] + names[1][1]);
}
}

@java_codings

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