Basic program in java

Basic program in java

• 1.
  B.Tech CS/3rd Year Object Oriented Techniques Practical File Sudeep Singh
• 2.
  Syntax Of Classes ♦♦ Simple class ♦♦ <class- keyword> <class- name> { <method- access specifier> <type- return/non_return> <method- name>() { operations } } ♦♦ static top most class ♦♦ <static- keyword><class- keyword> <class- name> { <method- access specifier> <type- return/non_return> <method- name>() { operations } } ♦♦ main class ♦♦ <class- keyword> <class- name> { public static void main (String [ ]s ) { System.out.println(“Welcome In BHABHA GROUP OF INSTITUTION”) ; } }
• 3.
  ♦♦1 program toadd two number ♦♦ class sum { public static void main(String[]s) { int a,b,c; a=Integer.parseInt(s[0]); b=Integer.parseInt(s[1]); c=a+b; System.out.println("sum = "+c); } } ♦♦2 program to multiply two number ♦♦ class multi { public static void main(String[]s) { int a,b,c; a=Integer.parseInt(s[0]); b=Integer.parseInt(s[1]); c=a*b; System.out.print("sum = "+c); } }
• 4.
  ♦♦3 program toprint factorial of any number ♦♦ class factorial { public static void main(String[]s) { int a,f=1; a=Integer.parseInt(s[0]); for(int i=a;i>=1;i--) { f=f*i; } System.out.println("Factorial of n = "+f); } } ♦♦4 program to find number is palindrom or not♦♦ class palindrom { public static void main(String[]s) { int a,b,c=0,d; a=Integer.parseInt(s[0]); d=a; do { b=a%10; c=c*10+b; a=a/10; } while(a>0); if(d==c) System.out.println("number is palindrom "+d); else System.out.println("number is not palindrom "+d); } }
• 5.
  ♦♦5 program tofind out no.is Armstrong or not ♦♦ class armstrong { public static void main(String[]s) { int a,b,c=0,d; a=Integer.parseInt(s[0]); { d=a; do { b=a%10; c=c+b*b*b; a=a/10; } while(a>0); if(d==c) System.out.println("number is armstrong "+d); else System.out.println("number is not armstrong "+d); } } } ♦♦6 program to find out even & odd number ♦♦ class number { public static void main(String[]s) { int a,b; a=Integer.parseInt(s[0]); b=Integer.parseInt(s[1]); for(int i=a;i<=b;i++) { if(i%2==0) System.out.println("Number is even = "+i); else System.out.println("Number is odd = "+i); } } }
• 6.
  ♦♦7 program toprint the table from “x” to “y”♦♦ class table { public static void main(String []s) { int a,b; a=Integer.parseInt(s[0]); b=Integer.parseInt(s[1]); if(a<=b) { for(int i=a;i<=b;i++) { for(int j=1;j<=10;j++) { System.out.print(j*i+" "); } System.out.println(" "); }} else { for(int i=b;i<=a;i++) { for(int j=1;j<=10;j++) { System.out.print(j*i+" "); } System.out.println(" "); } } } }
• 7.
  ♦♦ 8 programto print no. in various format ♦♦ class print { public static void main(String[]s) { int a,b; a=Integer.parseInt(s[0]); b=Integer.parseInt(s[1]); for(int i=a;i<=b;i++) { for(int j=a;j<=i;j++) { System.out.print(" "+j); } System.out.println(" "); } System.out.println(" "); for(int i=b;i>=a;i--) { for(int j=a;j<=i;j++) { System.out.print(" "+j); } System.out.println(" "); } System.out.println(" "); for(int i=b;i>=a;i--) { for(int j=b;j>=i;j--) { System.out.print(" "+j); } System.out.println(" "); } System.out.println(" "); for(int i=a;i<=b;i++) { for(int j=b;j>=i;j--) { System.out.print(" "+j); } System.out.println(" "); } System.out.println(" "); for(int i=a;i<=b;i++) { for(int j=i;j>=a;j--) {
• 8.
  System.out.print(" "+j); } System.out.println(" "); } System.out.println(" "); for(int i=b;i>=a;i--) { for(int j=i;j>=a;j--) { System.out.print(" "+j); } System.out.println(" "); } } }
• 9.
  ♦♦ 9 programOf Overriding ♦♦ class x { public void test(int a,int b ) { int c= a + b ; System.out.println("from class x sum ="+c); } } class y extends x { public void test(int a,int b ) { int c= a * b ; System.out.println("from class y multiplication ="+c); } } class overriding { public static void main(String [ ]s) { int a,b; a=Integer.parseInt(s[0]); b=Integer.parseInt(s[1]); y obj=new y( ); obj.test(a,b); } }
• 10.
  ♦♦ 10 programOf Overloading ♦♦ class x { public void test(int a, int b ) { int c = a * b ; System.out.println("multiplication of number = "+c); } } class y { public void test(int a, int b, int d ) { int c= a + b + d ; System.out.println("sum of given number = "+c); } } class overloading { public static void main (String [ ] s) { int a=Integer.parseInt(s[0]); int b=Integer.parseInt(s[1]); int d=Integer.parseInt(s[2]); x obj = new x( ); obj.test(a ,b ); y obj1 = new y( ); obj1.test(a ,b ,d ); } }
• 11.
  ♦♦11 Communication ofclass by creating object♦♦ class A { public void show( ) { System.out.println("welcome from A"); } } class B { public void show1( ) { A obj=new A( ); obj.show( ); } } class C { public static void main (String [ ] s) { B obj=new B( ); obj.show1( ); } }
• 12.
  ♦♦ 12 Communicationof class by inheritance ♦♦ class A { public void show( ) { System.out.println("welcome from A"); } } class B extends A { public void show1( ) { System.out.println("welcome from B"); } } class D { public static void main (String [ ] s) { B obj = new B( ); obj.show( ); } }
• 13.
  ♦ 13 Areaof circle & rectangle using object ♦ class circle { public void area_c(int r ) { int ar; ar=r*r*22/7; System.out.println("Area of circle= "+ar); } } class rect { public void area_rec(int le, int br ) { int ar; ar=le*br; System.out.println("Area of rectangle= "+ar); } } class area { public static void main (String [ ] s) { int r=Integer.parseInt(s[0]); int le=Integer.parseInt(s[1]); int br=Integer.parseInt(s[2]); circle obj=new circle( ); obj.area_c(r ); rect obj1=new rect( ); obj1.area_rec(le, br ); } }
• 14.
  ♦♦14 use ofabstract class ♦♦ abstract class test { abstract public void show( ); { } } class help extends test { public void show( ) { System.out.println(" from class help "); } } class take extends test { public void show( ) { System.out.println(" from class take "); } } class give extends test { public void show( ) { System.out.println(" from class give "); } } class abstractdemo { public static void main (String [ ] s) { help obj=new help( ); obj.show( ); take obj1=new take( ); obj1.show( ); give obj2=new give( ); obj2.show( ); } }