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Get Even Numbers Using Java Stream API

Java Stream API — Even Numbers (Full Screen) Java Stream API — Get Even Numbers Example 1 — Filter even numbers from a list Creates a list, uses Stream to filter evens, and prints them. Copy import java.util.*; import java.util.stream.*; public class EvenNumbersStream { public static void main(String[] args) { // Create a list of numbers List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10); // Use Stream API to filter even numbers List<Integer> evenNumbers = numbers.stream() .filter(n -> n % 2 == 0) .collect(Collectors.toList()); // Print the even numbers System.out.println( "Even numbers: " + evenNumbers); } } Example 2 — Use IntStream.rangeClosed ...
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3x3 Matrix addition and multiplication in C++



In this C++ program we will add and multiply two matrices and print the result on the screen.The elements of the matrices will be taken from the user.

input:

The elements of matrices.

output:

The addition and multiplication of the two matrices.

CODE---->


#include<iostream>
using namespace std;
class matrix{
 private:
  int mat[10][10];
 public:
  matrix()
  {
   int i,j;
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     mat[i][j]=0;
    }
   }
  }
  int getdata()
  {
   int i,j,n;
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< "\nEnter data(" <<i <<"," <<j << "): "; 
     cin>> n;
     mat[i][j]=n;
    }
   }
  }
  int displaydata()
  {
   int i,j;
   cout<< "\n";
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< mat[i][j] <<"\t";
    }
    cout<<"\n";
   }
  }
  matrix operator+(matrix ob2)
  {
   int i,j;
   int x[10][10];
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     x[i][j]=0;
     x[i][j]=mat[i][j]+ob2.mat[i][j];
    }
   }
   cout<< "\nThe addition result is: \n";
   cout<< "---------------------------\n";
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< x[i][j] <<"\t";
    }
    cout<<"\n";
   }
  }
  matrix operator*(matrix ob2)
  {
   int i,j,k;
   int x[20][20];
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     x[i][j]=0;
     for(k=1;k<=3;k++)
     {
      x[i][j]+=mat[i][k]*ob2.mat[k][j];
     }
    }
   }
   cout<< "\nThe multiplication result is: \n";
   cout<< "---------------------------------\n";
   for(i=1;i<=3;i++)
   {
    for(j=1;j<=3;j++)
    {
     cout<< x[i][j] <<"\t";
    }
    cout<<"\n";
   }
  }
 };
int main()
{
 matrix ob1,ob2,ob3,ob4;
 cout<< "Enter data for first matrix: ";
 ob1.getdata();
 cout<< "\nFirst created matrix is: \n";
 cout<< "-------------------------";
 ob1.displaydata();
 cout<< "\nEnter data for second matrix: ";
 ob2.getdata();
 cout<< "\nSecond created matrix is: \n";
 cout<< "--------------------------";
 ob2.displaydata();
 ob3=ob1+ob2;
 ob4=ob1*ob2;
 return 0;
}

Download the C++ file of this Program.

Don't just read, run on your pc !!!


RESULT :


Enter data for first matrix:
Enter data(1,1): -1

Enter data(1,2): 5

Enter data(1,3): 8

Enter data(2,1): -4

Enter data(2,2): 0

Enter data(2,3): 12

Enter data(3,1): 19

Enter data(3,2): -8

Enter data(3,3): 9

First created matrix is:
-------------------------
-1       5       8
-4       0       12
19       -8       9

Enter data for second matrix:
Enter data(1,1): 3

Enter data(1,2): -2

Enter data(1,3): 0

Enter data(2,1): 7

Enter data(2,2): 15

Enter data(2,3): 6

Enter data(3,1): -10

Enter data(3,2): 18

Enter data(3,3): 19

Second created matrix is:
--------------------------
3       -2       0
7       15       6
-10       18       19

The addition result is:
---------------------------
2       3       8
3       15      18
9      10      28

The multiplication result is:
---------------------------------
-48      221      182
-132      224      228
-89      4      123

--------------------------------
Process exited after 71.35 seconds with return value 0
Press any key to continue . . .


Images for better understanding :


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