Answer Posted / hira ratan sharma

Java methods are similar to functions or procedures in other
programming languages.

Every Java program must have one main() method.

Here is the main() method from a Java program which prints
"Hello World":

public static void main (String[] args) {
// This Java program prints "Hello World!"
System.out.println{"Hello World!");


A constructor creates an Object of the class that it is in
by initializing all the instance variables and creating a
place in memory to hold the Object. It is always used with
the keyword new and then the Class name. For instance, new
String(); constructs a new String object.

COnstructors are basically used to initialize the attributes
of the class.

Make a data structure and implement an algorithm to print all the files in a directory. (The root directory can have sub-directories too.)

1324

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What is string data?

977

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What is the use of set in java?

1115

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What does a boolean method return?

1220

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What is the difference between the direct buffer and non-direct buffer in java?

1022

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Is integer a class?

1073

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What is difference between protected and private?

1061

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What is static and final keyword in java?

1013

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What is classname class in java?

1050

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What is an iterator interface in java programming?

945

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What are keywords and reserved words in java?

1050

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How transient variable is different from volatile variable?

1070

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What is the difference between overriding and overloading in OOPS.

1142

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What is the default value of local and global variables?

1086

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Explain about features of local inner class?

1123

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