An anonymous class may implement an interface or extend a superclass, but may not bedeclared to do both.

sargam

• Aug 17th, 2018

Yes the anonymous Inner class can extend a class or can implement an interface but not both at a time

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How can we use method without using main method in JAVA?

rk

• Aug 9th, 2018

Using Static Method

Smitha Angadi

• May 11th, 2018

Using block method.

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Raghu Chahar

• Jun 5th, 2018

But char is a primitive datatype and String wraps it.

jegadeesh

 Profile Answers by jegadeesh Questions by jegadeesh

• Nov 9th, 2005

no String is not wrapper class.wrapper class is class that allows us to access primitive data types as objects.there r 8 wrapper classes r there in java. Integer,Float,Double,Byte,Charactor,Short,Long,Boolean.

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The null value is not a keyword.

Himanshu chauhan

• May 26th, 2018

False

jimmy514in

 Profile Answers by jimmy514in Questions by jimmy514in

• Jul 4th, 2010

Null is not a keyword in Java.It is a literal and cannot be used anywhereReference: http://java.sun.com/docs/books/tutorial/java/nutsandbolts/_keywords.html

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The if statement is used to select among two alternatives. It uses a boolean expression todecide which alternative should be executed. The switch statement is used to select among multiple alternatives. It uses an int expression to determine which alternativeshould be executed.

Poorvi Pathak

• May 8th, 2018

"If" is a selection statement. If the condition evaluates to true course of action/statement is executed otherwise it is ignored.
"Switch" is also a selection statement. The switch statement test the value of an expression against a list of integer or character constant.

Moamed Rafeek

• Apr 12th, 2018

"If-else" and "switch" both are selection statements. The selection statements, transfer the flow of the program to the particular block of statements based upon whether the condition is "true" or "fa...

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A) 1B) 2C) Both 1,2D) None of the above

Amarendra Kumar

• Apr 17th, 2018

C) Both 1,2

Sudhasri

• Dec 30th, 2017

Both 1,2

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Manoj

• Apr 10th, 2018

Synchronisation is a mechanism to make sure that exactly one thread will execute block with fresh values from main memory i.e. it must execute two way memory barrier. When thread enter into sync block then it must invalidate all values from cache and read from Main memory and vica versa

Shailesh Shinde

• May 25th, 2017

Synchronization makes sure that shared resources or data can be accessed by only one thread at a time while execution. its advantage is that it prevent data inconsistency and disadvantage is that it makes execution slower as it makes other thread wait till current thread completes execution.

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vinay

• Apr 4th, 2018

Then why it is given as java.lang.* instead of java.lang.object

anonymous

• Mar 2nd, 2017

Because all those basic classes like Object, String, Wrapper Classes, which are essential to build either a simple or complex program are available in java.lang package. Hence this package is made default.

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class Test{
public static void main(String [] args){
int a=8;
a=--a+a--+a++;
System.out.println(a );
}}

himanshu kumar singh

• Feb 14th, 2018

A=8; --a=8-1=7; now a value is 7 a--=7-1=6; now a value is 6 a++=6+1=7; now a=7+6+7=20

Code
int a=8;
a=--a+a--+a++;
System.out.println(a);

steven.mtl

• Jul 13th, 2017

20

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A) It enables you to access instance variables of any objects within a classB) It enables you to store values in instance variables of an objectC) It is used to call object methodsD) It is to create a new object

Saurabh kumar gupta

• Feb 4th, 2018

It enables you to access instance variables of any objects within a class

Lakhvir chahal

• Dec 15th, 2017

It is used to call object method

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I have a question in Java-string,
String s="adf5hgjyu1frdsff6vgyu7bnjh9asd3"; like
How to print only numbers in that string

Vincent

• Jan 11th, 2018

Run someCode() method from main()

Code
 
 
public static void someCode(){
                
                String s="adf5hgjyu1frdsff6vgyu7bnjh9asd3";
                int length=s.length();
                char ch;int n;
                for(int i=0;i<length;i++){
                        ch=s.charAt(i);
                        if(Character.isDigit(ch)){
                                n=Character.getNumericValue(ch);
                                System.out.println("the number is "+n+" and it is "+checkPrime(n));
                        }
                        
                }
                
        }
 
        public static String checkPrime(int n){
                
                if(n==1||n==2||n==3){return "Prime";}
                for(int i=2;i<n;i++){
                        if(n%i==0)
                                return "Not Prime";
                }
                return "Prime";
        }

rawatfeb

 Profile Answers by rawatfeb Questions by rawatfeb

• Feb 23rd, 2016

private static void NumericsFromStringTest() { String alphaNumericString = "h8ll0"; char[] carray = alphaNumericString.toCharArray(); for (char c : carray) { if (Character.isDigit(c)...

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You can do it without using key event, by creating an artificial key event using java.awt.Robot class to generate a "simple caracter" key press (for instance KeyEvent.VK_A). Sample Source Code -- May not be accurate but the concept is as follows. import java.awt.*;import java.awt.event.*;public class Test {      public static void main(String[] args) throws AWTException...

hobocat

• Dec 20th, 2017

There is same bug: when I changed the capslock's statusthe check result change nothing. "java public static void main(String[] args) throws InterruptedException { whil...

Tim Rousselet

 Profile Answers by Tim Rousselet Questions by Tim Rousselet

• May 23rd, 2011

You probably need to add !ev.isShiftDown() here if(Character.isUpperCase( ev.getKeyChar())) to check if CapsLock is really on.

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A) EncapsulationB) ClassC) InheritenceD) Polymorphism

kalpana s

• Jan 2nd, 2018

C) Inheritence

Pravin Chavan

• Sep 29th, 2017

Inheritance

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Vishal

• Jan 1st, 2018

When we are working with multiple threads, we have to make sure multiple threads are working on synchronized object otherwise different threads might see different values for same variables. In order...

sandychops

 Profile Answers by sandychops Questions by sandychops

• Feb 24th, 2015

Lock is a thread synchronization mechanism similar to synchronized blocks. From Java 5 the package java.util.concurrent.locks contains several lock implementations which we can use to achieve synchron...

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A) One B) Two C) ThreeD) Four Explanation: There are 3 types of comments namely Single-line, Multi-line and Documentation comment

A P Chavan

• Dec 4th, 2017

Three types of comments : Comment type | Used as 1. Single-line // Info :=>The compiler ignores everything from // to...

Ernie B

• Sep 27th, 2017

I would answer 2 depending on what you mean by "type of Comments..". This question can potentially be answered as follows:

Documentation Comment
* uses multi-line style

Implementation Comment
* uses traditional style (end of line or single line)

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Difference between CompareTo and equals method.

siva

• Oct 21st, 2017

equals() method is derived from Object class which is a super class in java indirectly and this method is used to verify the content of the two objects if same return true otherwise return false. In ...

Bharat

• Oct 1st, 2012

CompareTo method which is present in the String class is used to check the two strings. It checks each character with the other String and if found equals then returns 0. Else negative value or positi...

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preety Verma

• Oct 21st, 2017

There are two types of exceptions in Java
1.Checked
2.Unchecked

Kumaravel

• Jun 16th, 2016

Two type of exception
Checked Exception -> Compile time exception
Unchecked Exception -> Run time exception

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After a thread is started, via its start() method or that of the Thread class, the JVMinvokes the thread's run() method when the thread is initially executed.

RV

• Oct 7th, 2017

If we havent define run() method within child Class... and we call start() mathod throght child object...
and o/p will be Blank screen

subashrivasudevan

 Profile Answers by subashrivasudevan Questions by subashrivasudevan

• Nov 21st, 2008

Start method invokes it.It may or may not get executed immediately.

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Akshat Rathore

• Oct 7th, 2017

ArrayList :
New Capacity : Current Capacity * 3/2 + 1

Akshat

• Oct 7th, 2017

Initial capacity of Vector is 10. If we add 11th element it will increase to 20 and if we insert 21th element capacity will increase to 40. Hence New Capacity = Current Capacity * 2

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A) doubleB) intC) longD) float

Uday

• Aug 24th, 2017

C) long

cool2sathish

 Profile Answers by cool2sathish Questions by cool2sathish

• Dec 1st, 2016

Long
public static native void sleep(long millis) throws InterruptedException;

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