Basic java programs

Author: 7Aishwarya

SqSum.java

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+//java program to accept 10 numbers in an array and compute the square of these numbers. And then print the sum of these numbers
+
+import java.util.Scanner;
+
+public class SqSum
+
+{
+
+public static void main(String args[])
+
+{
+
+Scanner scanner = new Scanner(System.in);
+ 
+int n[]= new int[10];
+
+int sq[]= new int[10];
+
+int i,total=0;
+
+System.out.println("Enter 10 numbers:");
+
+for(i=0;i<10;i++)
+
+{
+
+n[i]=scanner.nextInt();
+
+sq[i]=n[i]*n[i];
+
+total=total+sq[i];
+
+}
+
+System.out.println("Sum of squares of 10 numbers= "+total);
+
+}
+
+}

add.java

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+//program to add two numbers using command line arguments
+
+class add
+
+{
+
+      public static void main(String a[])
+
+      {
+
+            int x,y,s;
+
+            x=Integer.parseInt(a[0]);
+
+            y=Integer.parseInt(a[1]);
+
+ 
+            s=x+y;
+
+            System.out.println("sum of " + x + " and " + y +" is " +s);
+
+      }
+
+}

calculator.java

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+//program to implement a command line calculator
+
+import java.util.Scanner;
+
+class calculator
+
+{
+
+      public static void main(String a[])
+
+      {
+
+            int n,x,y,s;
+
+            System.out.println("Enter your choice number: \n 1. Add\n 2. Subtract\n 3. Multiply\n 4. Divide\n 5. Mod\n");
+
+            n=Integer.parseInt(a[0]);
+
+            x=Integer.parseInt(a[1]);
+
+            y=Integer.parseInt(a[2]);
+
+            switch(n)
+
+            {   
+
+            case 1:
+ 
+            s=x+y;
+
+            System.out.println("sum of " + x + " and " + y +" is " +s);
+
+            break;
+ 
+           case 2: 
+  
+          s=x-y;
+  
+          System.out.println("subtraction of " + x + " and " + y +" is " +s);
+
+            break;
+  
+          case 3: 
+
+            s=x*y;
+
+            System.out.println("multiplication of " + x + " and " + y +" is " +s);
+ 
+           break;
+
+            case 4: 
+ 
+           s=x/y;
+
+            System.out.println("division of " + x + " and " + y +" is " +s);
+
+            break;
+
+            case 5:
+ 
+            s=x%y;
+
+            System.out.println("mod of " + x + " and " + y +" is " +s);
+
+            break;
+
+            default: break;
+ 
+           }
+
+      }
+
+}

class_object.java

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+//program using classes and objects in java
+
+class operations
+
+{
+
+void add(int x,int y)
+
+{
+
+int z;
+
+z=x+y;
+
+System.out.println("Sum of " +x+" and "+y +" is: " +z);
+
+}
+
+void subtract(int a, int b)
+
+{
+
+int c;
+
+c=a-b;
+
+System.out.println("Subtraction of " +a+" and "+b +" is: " +c);
+
+}
+
+}
+
+class class_object
+
+{
+
+public static void main(String args[])
+
+{
+
+operations obj = new operations();
+
+obj.add(5,2);
+
+obj.subtract(5,2);
+
+}
+
+}

fabonacci.java

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+//program to print fabonacci series using loop
+
+import java.util.Scanner;
+
+class fabonacci
+
+{
+
+public static void main(String args[])
+
+{
+
+int i,n,a,b,c;
+
+System.out.println("Enter the value of n: ");
+
+Scanner scan = new Scanner(System.in);
+
+n=scan.nextInt();
+
+a=0;
+
+b=1;
+
+System.out.println(a);
+
+System.out.println(b);
+
+for(i=1;i<n-1;i++)
+
+{
+
+c=a+b;
+
+System.out.println(c);
+
+a=b;
+
+b=c;
+
+}
+
+}
+
+}
+
+

greatest.java

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+//program to find the greatest of two numbers
+
+import java.util.Scanner;
+
+public class greatest
+{
+
+public static void main(String args[])
+{
+
+int a,b,big;
+
+Scanner scan=new Scanner(System.in);
+
+System.out.println("Enter two numbers: ");
+
+a=scan.nextInt();
+
+b=scan.nextInt();
+
+if(a>b)
+
+{
+
+big=a;
+
+}
+
+else
+
+{
+
+big=b;
+
+}
+
+System.out.println("Grestest of two numbers is: " +big);
+
+}
+
+}

month.java

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+//program to input a number of month and print it’s equivalent name of the month
+
+import java.util.Scanner;
+
+public class month
+
+{
+
+public static void main(String args[])
+
+{
+
+Scanner scanner = new Scanner(System.in);
+ 
+int n;
+
+System.out.println("Enter the month number:");
+
+n=scanner.nextInt();
+
+switch(n)
+
+{
+
+case 1:System.out.println("January");
+
+break;
+
+case 2:System.out.println("February");
+
+break;
+
+case 3:System.out.println("March");
+
+break;
+
+case 4:System.out.println("April");
+
+break;
+
+case 5:System.out.println("May");
+
+break;
+
+case 6:System.out.println("June");
+
+break;
+
+case 7:System.out.println("July");
+
+break;
+
+case 8:System.out.println("August");
+
+break;
+
+case 9:System.out.println("September");
+
+break;
+
+case 10:System.out.println("October");
+
+break;
+
+case 11:System.out.println("November");
+
+break;
+
+case 12:System.out.println("December");
+
+break;
+
+}
+
+}
+}