The document explains methods in Java as a set of statements that can perform tasks and return results, allowing for code reuse. It highlights the importance of methods being part of a class and the difference between data type returns and void methods. An example is provided to illustrate method invocation and class structure.

2. Methods
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• It is a collection of statements that perform some specific task and return the
result to the caller.
• A method can perform some specific task without returning anything.
• Methods allow us to reuse the code without retyping the code.
• In Java, every method must be part of some class.

3. Method Declaration
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• Data type values can return.
• Void can’t return.

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Calling a Method
 Method to be invoked when,
 Complete statement in the method
 It reaches a return statement
 Throws an exception
 Based on access modifier, method can
be accessed.
class Addition {
int sum = 0;
public int addTwoInt(int a, int b){
sum = a + b;
return sum;
}
}
class GFG {
public static void main (String[] args){
Addition add = new Addition();
int s = add.addTwoInt(1,2);
System.out.println(s);
}
}