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![class sum {
void sum(int a,int b)
{
System.out.println( (a+b));
}
void sum(int a,int b,int c)
{
System.out.println( (a+b+c));
}
public static void main(String args[])
{
sum obj=new sum();
obj.sum(10,5);
obj.sum(10,5,10);](https://image.slidesharecdn.com/methodsandconstructorsinjava-131116024333-phpapp01/75/Methods-and-constructors-in-java-9-2048.jpg)
![•
class Constructor Demo{
Constructor Demo(){
System.out.println("Inside no argument constructor");
}
ConstructorDemo(String name){
System.out.println("Inside one argument constructor in Java with
name: " + name);
}
public static void main(String args[]) {
Constructor Demo d = new ConstructorDemo(); //calling no
argument constructor in java
Constructor Demo e = new ConstructorDemo("Testing"); //calling
one argument constructor in java
}
}](https://image.slidesharecdn.com/methodsandconstructorsinjava-131116024333-phpapp01/75/Methods-and-constructors-in-java-12-2048.jpg)
Methods and constructors in java
This document discusses methods and constructors in Java, explaining that methods are collections of statements that perform operations while constructors initialize objects when they are first created and have the same name as the class. It provides examples of method and constructor declarations and calls, demonstrating how to define methods with different parameters and initialize objects using constructors.
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Methods and constructors in java
- 2. Disclaimer: This presentationis prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
- 3. Methods and constructorsin java Shanu k k shanukk89@gmail.com www.facebook.com/shanunn i twitter.com/shanu in.linkedin.com/in/shanu k k 9656153432
- 4.
- 5.
- 6. Method oA Java methodis a collection of statements that are grouped together to perform an operation o A class without method has no life,the object created by such class cannot respond to any message o Methods are declared inside the body of the class but immediately after the declaration of the instance variable
- 7.
- 8. Eg: Class rectangle { int length,width; Void getData(int x,int y) { Length=x; Width=y; } }
- 9. class sum { voidsum(int a,int b) { System.out.println( (a+b)); } void sum(int a,int b,int c) { System.out.println( (a+b+c)); } public static void main(String args[]) { sum obj=new sum(); obj.sum(10,5); obj.sum(10,5,10);
- 10. Constructor: o Object wecreated must be given to instial values o We have done earlier using two approaches 1 2 Dot operator:access the instance variable and assign value them indiviidualy getData method:intialise each object individually
- 11. it would besimpler to initialise an object when it’s first created _special type of method is called construcor • Constructor have the same name as the class itself • They do not specify any return type not even void
- 12. • class Constructor Demo{ ConstructorDemo(){ System.out.println("Inside no argument constructor"); } ConstructorDemo(String name){ System.out.println("Inside one argument constructor in Java with name: " + name); } public static void main(String args[]) { Constructor Demo d = new ConstructorDemo(); //calling no argument constructor in java Constructor Demo e = new ConstructorDemo("Testing"); //calling one argument constructor in java } }
- 13. • Output: Inside noargument constructor Inside one argument constructor in Java with name: Testing •
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