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Java Programming

The Java programming language was released in 1995 as a core component of the Java platform of Sun Microsystems. It is a general-purpose, class-based, object-oriented language that is widely used in application software and web applications.

5,203 Questions

What are the good qualification of the genunie person?

A genuine, good person believes that God created him or her, and they believe that God is One and has no partners. So they don't say that anyone is like God in anyway. They admit and acknowledge what they are. We are simply creations in need of our Creator every second. There are two kinds of people: Good guys and Bad guys. The genuine person asks God to make him or her one of the good guys. And the good guys do fight the bad guys, but some times in very subtle positively clever ways. aicp

What is an element in the Array?

An array is a container object that holds a fixed number of values of a single type. ... Each item in an array is called an element, and each element is accessed by its numerical index. As shown in the preceding illustration, numbering begins with 0. The 9th element, for example, would therefore be accessed at index 8.

What is the sum of 105.7?

The sum of the two numbersis 105.7 the difference of the two number is19

What is a ja patty?

it is a unused for years slang for a coffee party ja being slang for java

What does static head mean?

"Head" is a term given to the weight and resulting pressure of a column of liquid above a given point in the system. Static head means that the head pressure is measured with no liquid actually flowing. Dynamic head would be the pressure of the liquid while it is actually flowing.

How is an applet started by a browser?

Once you have made the applet, you need to make an HTML file to launch the applet. Search google for examples, it's only about 3 lines of code

Write a java code to draw a circle inside in an ellipse?

write a program draw circle and ellipse by using oval methods in java

What Errors are relatively easy to locate and correct because the compiler or interpreter you use highlights every error?

Run time errors or syntax errors are most easy to locate, since the compiler will show you where the errors are. A logic error would be more difficult to locate, since the program runs but does not compute the desired result.

List four JDBC drivers?

  • JDBC ODBC Bridge
  • Native API Partly Java Driver
  • Net Protocol full Java driver

are some types of jdbc drivers

What modifier do you use to prevent that class from having any subclasses?

In Java, you use the final modifier to prevent a class from having any subclasses.

What is the maximum combined length of command line arguments including the space between adjacent arguments?

So for as i know, it depends on the first argument which represents the number of arguments. If argc is 2 bytes in length, 65535 strings can be passed. If argc is 4 bytes in length, 4294967295 strings can be passed. In Both the cases first one is for program name. And the total length should not exceed the heap size.

S.Sunil kumar,MCA(2008-2011) from CEG, Anna University

Answer: OS dependent, for example in DOS only 127

What is a random number and how are generated?

Random numbers that are generated by a computer are pseudo-random (not really random), but they will pass enough statistical tests for randomness to be useful in simulation random processes. Java has random number generators in the standard libraries.

See the related link if you need more information.

What command executes the Java class file Welcomeclass?

I assume you meant Welcome.class, in which case, it would be:

java Welcome

Convert input number to word in java codes?

//By rohan import java.text.DecimalFormat; public class EnglishNumberToWords { private static final String[] tensNames = { "", " ten", " twenty", " thirty", " forty", " fifty", " sixty", " seventy", " eighty", " ninety" }; private static final String[] numNames = { "", " one", " two", " three", " four", " five", " six", " seven", " eight", " nine", " ten", " eleven", " twelve", " thirteen", " fourteen", " fifteen", " sixteen", " seventeen", " eighteen", " nineteen" }; private static String convertLessThanOneThousand(int number) { String soFar; if (number % 100 < 20){ soFar = numNames[number % 100]; number /= 100; } else { soFar = numNames[number % 10]; number /= 10; soFar = tensNames[number % 10] + soFar; number /= 10; } if (number == 0) return soFar; return numNames[number] + " hundred" + soFar; } public static String convert(long number) { // 0 to 999 999 999 999 if (number == 0) { return "zero"; } String snumber = Long.toString(number); // pad with "0" String mask = "000000000000"; DecimalFormat df = new DecimalFormat(mask); snumber = df.format(number); // XXXnnnnnnnnn int billions = Integer.parseInt(snumber.substring(0,3)); // nnnXXXnnnnnn int millions = Integer.parseInt(snumber.substring(3,6)); // nnnnnnXXXnnn int hundredThousands = Integer.parseInt(snumber.substring(6,9)); // nnnnnnnnnXXX int thousands = Integer.parseInt(snumber.substring(9,12)); String tradBillions; switch (billions) { case 0: tradBillions = ""; break; case 1 : tradBillions = convertLessThanOneThousand(billions) + " billion "; break; default : tradBillions = convertLessThanOneThousand(billions) + " billion "; } String result = tradBillions; String tradMillions; switch (millions) { case 0: tradMillions = ""; break; case 1 : tradMillions = convertLessThanOneThousand(millions) + " million "; break; default : tradMillions = convertLessThanOneThousand(millions) + " million "; } result = result + tradMillions; String tradHundredThousands; switch (hundredThousands) { case 0: tradHundredThousands = ""; break; case 1 : tradHundredThousands = "one thousand "; break; default : tradHundredThousands = convertLessThanOneThousand(hundredThousands) + " thousand "; } result = result + tradHundredThousands; String tradThousand; tradThousand = convertLessThanOneThousand(thousands); result = result + tradThousand; // remove extra spaces! return result.replaceAll("^\\s+", "").replaceAll("\\b\\s{2,}\\b", " "); } /** * testing * @param args */ public static void main(String[] args) { System.out.println("*** " + EnglishNumberToWords.convert(0)); System.out.println("*** " + EnglishNumberToWords.convert(1)); System.out.println("*** " + EnglishNumberToWords.convert(16)); System.out.println("*** " + EnglishNumberToWords.convert(100)); System.out.println("*** " + EnglishNumberToWords.convert(118)); System.out.println("*** " + EnglishNumberToWords.convert(200)); System.out.println("*** " + EnglishNumberToWords.convert(219)); System.out.println("*** " + EnglishNumberToWords.convert(800)); System.out.println("*** " + EnglishNumberToWords.convert(801)); System.out.println("*** " + EnglishNumberToWords.convert(1316)); System.out.println("*** " + EnglishNumberToWords.convert(1000000)); System.out.println("*** " + EnglishNumberToWords.convert(2000000)); System.out.println("*** " + EnglishNumberToWords.convert(3000200)); System.out.println("*** " + EnglishNumberToWords.convert(700000)); System.out.println("*** " + EnglishNumberToWords.convert(9000000)); System.out.println("*** " + EnglishNumberToWords.convert(9001000)); System.out.println("*** " + EnglishNumberToWords.convert(123456789)); System.out.println("*** " + EnglishNumberToWords.convert(2147483647)); System.out.println("*** " + EnglishNumberToWords.convert(3000000010L)); /* OUTPUT WILL BE LIKE THIS *** zero *** one *** sixteen *** one hundred *** one hundred eighteen *** two hundred *** two hundred nineteen *** eight hundred *** eight hundred one *** one thousand three hundred sixteen *** one million *** two millions *** three millions two hundred *** seven hundred thousand *** nine millions *** nine millions one thousand *** one hundred twenty three millions four hundred ** fifty six thousand seven hundred eighty nine *** two billion one hundred forty seven millions ** four hundred eighty three thousand six hundred forty seven *** three billion ten **/ } }

Which package is heavier 85 g or 2oz?

Data in computers is not measured in grams...However, to answer your question, 85 grams is heavier; 2 ounces is 56.69 grams when converted.

What is jfc?

The Java Foundation Classes (JFC) are a comprehensive set of GUI components and services which dramatically simplify the development and deployment of commercial-quality desktop and Internet/Intranet applications.

Can a DateTime variable be null?

hi i can say that datetime cant be null because datetime is valuetyp(struct) its not referece type(object)

Using pointers. write a function that receives a character string and a character as argument and deletes all occurrences of this character in the string?

guys ..... instead of using actual pointer arguments i have used parameters ...

this will give you a far better idea of using pointers ........and i have used setbuf function because i am using emacs , it buffers output !!...... just enjoy

#include<stdio.h>

#include<string.h>

void main()

{

char ch,str[25],del[25];

char *p,*q,*r;

int i;

setbuf(stdout,NULL);

printf("\nenter the string:-\n");

gets(str);

setbuf(stdout,NULL);

printf("\nenter the character:-\n");

gets(&ch);

p=str;

r=del;

q=&ch;

delete(p,q,r);

printf("\nthe string with the deleted characters is:-\n%s",del);

}

delete(char *p,char *q,char *r)

{

while(*p!='\0')

{

if(*p!=*q)

{

*r=*p;

r++;

p++;

}

else

{

p++;

continue;

}

}

*r='\0';

}

Give some examples of keywords?

Java Keywords
  • abstract
  • assert
  • boolean
  • break
  • byte
  • case
  • catch
  • char
  • class
  • const
  • continue
  • default
  • do
  • double
  • else
  • enum
  • extends
  • final
  • finally
  • float
  • for
  • goto
  • if
  • implements
  • import
  • instanceof
  • int
  • interface
  • long
  • native
  • new
  • package
  • private
  • protected
  • public
  • return
  • short
  • static
  • strictfp
  • super
  • switch
  • synchronized
  • this
  • throw
  • throws
  • transient
  • try
  • void
  • volatile
  • while
The Java Language Specification makes a special note of the "goto" and "const" keywords:

The keywords const and goto are reserved, even though they are not currently used. This may allow a Java compiler to produce better error messages if these C++ keywords incorrectly appear in programs. C++ Keywords
  • and
  • and_eq
  • asm
  • auto
  • bitand
  • bitor
  • bool
  • break
  • case
  • catch
  • char
  • class
  • compl
  • const
  • const_cast
  • continue
  • default
  • delete
  • do
  • double
  • dynamic_cast
  • else
  • enum
  • explicit
  • export
  • extern
  • false
  • float
  • for
  • friend
  • goto
  • if
  • inline
  • int
  • long
  • mutable
  • namespace
  • new
  • not
  • not_eq
  • operator
  • or
  • or_eq
  • private
  • protected
  • public
  • register
  • reinterpret_cast
  • return
  • short
  • signed
  • sizeof
  • static
  • static_cast
  • struct
  • switch
  • template
  • this
  • throw
  • true
  • try
  • typedef
  • typeid
  • typename
  • union
  • unsigned
  • using
  • virtual
  • void
  • volatile
  • wchar_t
  • while
  • xor
  • xor_eq

What is the process of assigning a value to a variable called?

That is called "assignment".

That is called "assignment".

That is called "assignment".

That is called "assignment".

Can you overload plus equals in java?

yes to over load plus in java by using arthamatic operation we can perform it

How do you write a program in Java to check whether a number is a pal prime or not?

import java.io.*;

class PalPrime

{

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

int x;

void inputData(int X)throws IOException

{

x=X;

}

int Pal(int y)

{

int a=y,b=0,rev=0;

while(a>0)

{

b=a%10;

rev=rev*10+b;

a=a/10;

}

if (rev==y)

return 1;

else

return 2;

}

boolean Prime(int m)

{

int c=0;

for(int i=1;i<=m;i++)

{

if (m%i==0)

c++;

}

if (c==2)

return true;

else

return false;

}

void main()throws IOException

{

System.out.println("Enter a 4 digit no");

int X=Integer.parseInt(br.readLine());

inputData(X);

System.out.println("Enter the same no. again");

int y1=Integer.parseInt(br.readLine());

Pal(y1);

System.out.println("Enter the same no. again");

int m1=Integer.parseInt(br.readLine());

Prime(m1);

if (Pal(y1)==1 && Prime(m1)==true)

System.out.println(x+" is a Pal-Prime No.");

else

System.out.println(x+" is not a Pal-Prime No.");

}

}