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Programming Articles
Page 1546 of 2547
Make the first letter caps and the rest lowercase in Java
The following is an example −Examplepublic class Demo { public static void main(String[] args) { String str = "laptop"; System.out.println("Original String = " +str); // letter one String strOne = str.substring(0,1).toUpperCase(); // remaining letters String strTwo = str.substring(1).toLowerCase(); System.out.println("Resultant String = "+strOne + strTwo); } }OutputOriginal String = laptop Resultant String = Laptop
Read MoreWhat is the difference between new/delete and malloc/ free in C/ C++?
new/ deleteThe new operator requests for the memory allocation in heap. If the sufficient memory is available, it initializes the memory to the pointer variable and returns its address.The delete operator is used to deallocate the memory. User has the privilege to deallocate the created pointer variable by this delete operator.Here is an example of new/delete operator in C++ language,Example#include using namespace std; int main () { int *ptr1 = NULL; ptr1 = new int; float *ptr2 = new float(299.121); int *ptr3 = new int[28]; *ptr1 = 28; cout
Read MoreJava Program to get full day name
To display the full day name, use the SimpleDateFormat(“EEEE”) as shown below −// displaying full-day name f = new SimpleDateFormat("EEEE"); String str = f.format(new Date()); System.out.println("Full Day Name = "+str);Since, we have used the Format and SimpleDateFormat class above, therefore import the following packages. With that, we have also used the Date.import java.text.Format; import java.text.SimpleDateFormat; import java.util.Date;Exampleimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Calendar; public class Demo { public static void main(String[] args) throws Exception { // displaying current date and time Calendar cal = Calendar.getInstance(); SimpleDateFormat simpleformat = new ...
Read MoreJava Program to display date and time information in lowercase
Firstly, create a Formatter and a Calendar object.Formatter f = new Formatter(); Calendar c = Calendar.getInstance();To display complete date and time information use the ‘c’ conversion character. However, to display it in lowercase, use ‘tc’ −f = new Formatter(); System.out.println(f.format("Date and Time (lowercase): %tc", cal));The following is an example −Exampleimport java.util.Calendar; import java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); Calendar cal = Calendar.getInstance(); System.out.println("Current date and time: "+cal.getTime()); ...
Read MoreParse Octal string to create BigInteger in Java
To parse the octal string to create BigInteger, use the following BigInteger constructor and set the radix as 8 for Octal −BigInteger(String val, int radix)This constructor is used to translate the String representation of a BigInteger in the specified radix into a BigInteger.In the below example, we have set the BigInteger and radix is set as 8.BigInteger one, two; one = new BigInteger("12"); two = new BigInteger("4373427", 8);The following is the complete example −Exampleimport java.math.*; public class Demo { public static void main(String[] args) { BigInteger one, two; one = new BigInteger("12"); ...
Read MoreParse decimal string to create BigInteger in Java
To parse the decimal string to create BigInteger, just set the decimal string in the BigInteger.Here is our BigInteger.BigInteger one; String decStr = "687879"; one = new BigInteger(decStr);Let us see another example −Exampleimport java.math.*; public class Demo { public static void main(String[] args) { BigInteger one, two; String decStr = "4373427"; one = new BigInteger("250"); two = new BigInteger(decStr); System.out.println("Result (BigInteger) : " +one); System.out.println("Result (Parsing Decimal String) : " +two); } }OutputResult (BigInteger) : 250 Result (Parsing Decimal String) : 4373427
Read MoreWhat does '?' do in C/C++?
The operator ‘?’ is known as ternary operator as it requires three operands to act upon. It can be represented by “ ? : ”. It is also known as conditional operator. The operator improves the performance and reduces the lines of code.Here is the syntax of ternary operator in C language, Expression1 ? Expression2 : Expression3Here is an example of Ternary Operator in C language, Example#include int main() { int a = -1; double b = 26.4231; int c = a? printf("True value : %lf", b):printf("False value : 0"); return 0; }OutputHere is ...
Read MoreRight pad a string in Java
To right pad a string, use the String.format and set the spaces.String.format("%1$-" + 20 + "s", "demotext"));If you add 30 above, it will display the next string after 30 spaces from the beginning.String.format("%1$-" + 30 + "s", "demotext")The following is an example.Examplepublic class Demo { public static void main(String []args){ System.out.print(String.format("%1$-" + 20 + "s", "demotext")); System.out.println("Right padded!"); } }Outputdemotext Right padded!
Read MoreParse hexadecimal string to create BigInteger in Java
To parse the hexadecimal string to create BigInteger, use the following BigInteger constructor and set the radix as 16 for Hexadecimal.BigInteger(String val, int radix)This constructor is used to translate the String representation of a BigInteger in the specified radix into a BigInteger.In the below example, we have set the BigInteger and radix is set as 16 −Exampleimport java.math.*; public class Demo { public static void main(String[] args) { BigInteger one, two; String hexStr = "290f98"; one = new BigInteger("250"); // parsing two = new ...
Read MoreRestrictions applied to Java static methods
If the static keyword is applied to any method, it becomes a static method.If a method is declared as static, it is a member of a class rather than belonging to the object of the class. It can be called without creating an object of the class. A static method also has the power to access static data members of the class.There are a few restrictions imposed on a static methodThe static method cannot use non-static data member or invoke non-static method directly.The this and super cannot be used in static context.The static method can access only static type data ...
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