moaz.amin.37

hello friends i have a problem with javafx AnchorPane. I have an anchorpane that contains a button i want to set the height and width of anchorpane to zero but it no apply. how to do this .... actually i am working on a sliding panel

hello!I install tomcat server and set CLASSPATH variable `servlet-api` and my servlets running properly but when i compile and run my old program program of `java 2 SE` then it compile successfully but not run it prints an error message G:\Java>javac BinarySearchDemo.java G:\Java>java BinarySearchDemo Error: Could not find or load …

if a gui have 2 text fields and there are 10 buttons(0-9) to input numbers in text fields then how it will choose that which field get input. this i problem in my gui i write 2 methods but not working my code is below public void actionPerformed(ActionEvent e){ if(e.getSource()==b1){ …

i read adapter classes everything is write but i am confuse about Listener Interfaces and Adapter classes concept priblem is that when java create adapter classes it implements corresponding interface and privide defination with empty bodies of all methods that are present in interface this is declaration public class WindowAdapter …

i write a code in java of GUI calculator. i handle its addition event only but it is not working i don't know why its code is here import java.awt.*; import javax.swing.*; import java.awt.event.*; class Calculator extends JFrame implements ActionListener{ JTextField jtext; JPanel p; JLabel lab; JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bPlus,bMinus,bMul,bPoint,bClear,bEqual; public Calculator(){ …

i have a problem in JDBC every thing is ok it shows this message `java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver` i already create DSN but but it stil show this error i do not know what i do My jdk is 64 bit and i create DSN of odbc 32 bit is any problem …

Hello to all first look this code class Square1 implements Runnable{ int a; public void run(){ a=10; } } class Square2 implements Runnable{ Square1 ob=new Square1(); public void run(){ System.out.println("Square Of this number is = "+(ob.a*ob.a)); } } class SquareThread{ public static void main(String args[]){ Thread t1=new Thread(new Square1()); Thread …

i write a code that coun t the number of upper case letter in a string there is a problem my code count space as capital letter code is below #include<iostream> #include<conio.h> #include<cstring> #include<string.h> using namespace std; class Letters{ private: char str[20]; int num; public: Letters(){ str[0]='\0'; num=0; } void …

i write a program its output is below G:\Java\Multithreading>java NewThread Child Thread Thread[main,5,main] Main Thread 1 Child Thread 1 Main Thread 2 Main Thread 3 Main Thread 4 Main Thread 5 Main Thread Complete Child Thread 2 Child Thread 3 Child Thread 4 Child Thread 5 Child Thread Complete in …

hello i have a problem with Priority when I set priority of any thread then I get wrong output my code is below class Run implements Runnable{ private String st; public Run(String s){ st=s; } public void run(){ for(int i=1 ; i<=10 ; i++){ System.out.println(st+"="+i); } } } class PriorityCheck{ …

i write a code of multithreading in which arise an race condition code is below class Race1{ public void show(String s){ try{ System.out.print("["+s); Thread.sleep(1000); }catch(InterruptedException e){ e.printStackTrace(); } System.out.println("]"); } } class Checking implements Runnable{ Race1 ob=new Race1(); String s; public Checking(String s){ this.s=s; } public void run(){ synchronized(ob){ ob.show(s); …

when we create a thread like this class Run implements Runnable{ public void run(){ //You code } } class Helloworld{ public static void main(String args[]){ Thread t1=new Thread(new Run()); Thread t2=new Thread(new Run()); } } in above code thread t1 and thread t2 is creating in `main()` method its mean …

import java.io.*; class ConsoleInput{ public static void main(String ss[]) throws IOException{ InputStreamReader isr=new InputStreamReader(System.in); BufferedReader br=new BufferedReader(isr); char c=' '; System.out.println("Enter Characters And q to Quiet"); do{ c=(char)br.read(); System.out.println(c); }while(c != 'q'); } } in upper code this line `c=(char)br.read();` get string from user at this point user enter some …

Hello every body i have a problem with Scanner class.So my question is that when we use `BufferedReader` or`InputStreamReader` to reading and writing input and output then we use `close()`method to close the stream but in the case of `Scanner` why we do not close the stream this is my …

hello i am doing my assignment on simple calculator in java.Now I want to handle exceptions in it. so i need some information about exception for exemple a user enter any expression like `(10+23+56-55)` it is corrent formate but when the user enter wrong formate like `(20++56//5)` i mean operator …

i want to place a button on upper left corner of JFrame with GridBagLayout.i write this code but it is notwork correctly gbc.gridx=0; gbc.gridx=0; add(b1,gbc); but the button place on center of JFrame why

hello to all i have problem about button events the problem is that if i handle an event of button and show again a window(result of event) that also has buttons then how to handle events of buttons of second window please help me

import java.io.*; class WriteFile { public static void main(String ss[]) { try { FileWriter fw=new FileWriter("output.txt"); PrintWriter pw=new PrintWriter(fw); String s1="Hello World"; String s2="I Am Learning Java"; pw.println(s1); pw.println(s2); pw.flush(); pw.close(); fw.close(); } catch(IOException e) { System.out.println(e); } } } in upper code println() is called with object of `PrintWriter` …

Exception message is not showing import java.util.*; class WrongException extends Exception{ public WrongException(String s){ super(s); } } public class UserDefinedException2{ public static void main(String s[]){ int a,b; a=b=0; Scanner ob=new Scanner(System.in); System.out.print("Enter your age = "); a=ob.nextInt(); try { if(a<=0) throw new WrongException("age cannot be zero or nagetive"); System.out.print("age = …

if a program throw 2 exceptions can we handled it by user defined exception.for example import java.util.*; class WrongException extends Exception{ public WrongException(String s){ super(s); } } public class UserDefinedException2{ public static void main(String s[]){ int a,b; a=b=0; Scanner ob=new Scanner(System.in); System.out.print("Enter your age = "); a=ob.nextInt(); try { if(a<=0) …

Following exceptions are `Checked Exception` or `Unchecked Exception` ArrayStoreException IllegalArgumentException

exception is a run time error,then why exceptions are again classified into compile time exception and run time exception,in that case it should be run time exceptions only.please give explanation with suitable real time example

i am confuse about `paint()` method in applet .The confusion is that paint method is getting object as parameter of Graphics class like this `public void paint(Graphics g)` and i read that the Graphics class is an abstract class then how we create object of Graphics class and now you …

first se these methods setForeground(Color.cyan); setBackground(Color.red); these methods are defined in Component class like this java.awt.Component and we pass parameters of an other class this is very confusable for me that we pass class members as parameters to method of a different class, i mean `setForeground(Color.cyan)` i defined in Component …

i am very confuse about java applets so please solve my questions my question is that when we write applet then we write only methods defination not method calling so i am confuse about this that who call the methods of applets.and second is that we call the methods of …

hello every body. I need a book at java swing package.i am new in java programming and i want to learn GUI so plz help me. i want to download book of herbert schildt. book name swing a beginner guide Author Herbert Schildt

the virtual Methods concept is very difficult concept. In c++ when we want to implement polymorphism then we use virtual function. But in the case of java i read that all methods in java are virtual by default except final methods that can not be overridden. I am confuse about …

i can understand it when we want to implement polymorphism in c++ we use virtual functions and function overriding but when we want to implement polymorphism in java then we do not use virtual methods why. in java we use simply reference object that can store the address and use …

It is commanly said that java is architectural neutral what is the basic concept of this.I want brief answer on it and some examples of this.

hi i can't undestanding this why the main function in java is static and static function can call using class name. And why we declare main function as public. i can not understanding this procedure of main function in java. plz help me.

i can not understanding the error of this program interface Test { void show(); void input(); void square(); } class Run implements Test { int a,b,c; void show() { System.out.println("a = " + a); System.out.println("b = " + b); System.out.println("c = " + c); } void input() { a=2; b=3; …

i have a problem with code below import javax.swing.*; class HelloWorld { public static void main(String x[]) { JOptionPane.showMessageDilog(null,"Welcome","Bscs",1); } } i try my best but i can not understand the following error HelloWorld.java:5: error: cannot find symbol JOptionPane.showMessageDiloge(null,"Welcome","Bscs",1); ^ symbol: method showMessageDiloge(<null>,String,String,int) location: class JOptionPane 1 error plz help …

i need a simple project of microsoft access for beginner bacause i am beginner in database plz help me and give me a simple project

postfix and prefix increment or decrement operators very very confusing for me i try my best but i can not understand the basic different between them plz help me i know The prefix form first performs the increment operation and then returns the value of the increment operation. The postfix …

what is command line argument in java and how it is work public static void main(String []args){ for (int i = 0; i < args.length; i++) System.out.println(args[i]); and what is .length in upper code. is it function no it is not function is it class no it is not a …

i know that in polymorphism when we not use virtual function then the compiler is execuite member function according to pointer type and when we use virtual function then compiler execute member function according to the type of object My question is that WHY it is happnes what is the …

any one is here that explain to me that how to get console input using BufferReader in java and explain me its working briefly.

hi: we use system("cls") function in c++ i need a function or a class or any command that i give it in my code that clear my screen plz help me

there is my question that normally in java we create object with new operator but when we want to use String and String is also a class then we declare object without new operator why plz answer my question

My code is not compile and run Code is Below import java.util.Scanner; class Input { public static void main(String arg[]) { int rno; System.out.print("Enter Your Name = "); System.in.nextInt(rno); } } i think if System.out.println() is run then upper code should have to run but not run please solve this …

My question is that what is ".in" in system.in and i am not understandin the workin of System.in suppose Scanner obj=new Scanner(System.in); plz understand me the working of upper line.

Actually I have two questions 1) Why we not create Object with simple mathod like [(class name) (object name;)] in java 2) Why we use Constructor to create object code below class Run{} Run obj=new Run() why not use this code Run obj=new Run; Please relese my confusion

i need some information about the Assembly instruction in processor iapx 8088. if there is any link of any articles that can help me then plz send me this is my assignment. And i want good grades in my assignment.

i have a problem and i can not solve it. Problem is that for example there is an admission form on internet and a student enter his name in digits no dought it is wrong and now here is a problem how to restrict the student that he/she should not …

i have a problem that how to concatenate more than two string in operator overloading i write a code but it is not run #include<iostream> #include<conio.h> using namespace std; class count { private: char str[50]; public: count() { str[0]='r'; } void input() { cout<<"Enter string = "; cin.getline(str,50); } count …

i also understand this but how to concatenate two or more string usin operating overloading

i want to understand that what is bolean data type in c++. I tried to my best but i can not understand boolean data type plz help me

Assalam o Alikum my question is that what is the difference between character array and string. my instructor is use char str [50] instead of string str. and i can not understand what is difference between them.

my question is that when we use static data member and ststic function and nobody can not satisfy me about this question i need actual reason of using the static data member and ststic member function

write a c++ class run that contains followin data member 1)name of runner. 2)distance covered by runner. class ha following member function 1)get function for input runner name and distance. 2)show function to display runner name and distance. the user should be able to show the name of the runner …