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Articles on Trending Technologies
Technical articles with clear explanations and examples
Parse 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 ...
Read MoreWhen to use new operator in C++ and when it should not be used?
Use of the new operator signifies a request for the memory allocation on the heap. If the sufficient memory is available, it initializes the memory and returns its address to the pointer variable.The new operator should only be used if the data object should remain in memory until delete is called. Otherwise if the new operator is not used, the object is automatically destroyed when it goes out of scope. In other words, the objects using new are cleaned up manually while other objects are automatically cleaned when they go out of scope.The following is the syntax of new operator.pointer_variable ...
Read MoreParsing and Formatting a Big Integer into Binary in Java
Firstly, take two BigInteger objects and set values.BigInteger one, two; one = new BigInteger("99"); two = new BigInteger("978");Now, parse BigInteger object “two” into Binary.two = new BigInteger("1111010010", 2); String str = two.toString(2);Above, we have used the following constructor. Here, radix is set as 2 for Binary for both BigInteger constructor and toString() method.BigInteger(String val, int radix)This constructor is used to translate the String representation of a BigInteger in the specified radix into a BigInteger.The following is an example −Exampleimport java.math.*; public class Demo { public static void main(String[] args) { BigInteger one, two; ...
Read MoreSchedule a task for execution in Java after a given delay
One of the methods in the Timer class is the void schedule(Timertask task, long delay) method. This method schedules the specified task for execution after the specified delay.Declaration −The java.util.Timer.schedule(Timertask task, long delay) is declared as follows −public void schedule(Timertask task, long delay)There are few exceptions thrown by the schedule(Timertask task, long delay) method. They are as follows −IllegalArgumentExceptionThis exception is thrown if delay is negative, or delay + System.currentTimeMillis() is negative.IllegalStateExceptionThis exception is thrown if task was scheduled or cancelled beforehand, timer was cancelled, or timer thread terminated.NullPointerExceptionThis exception is thrown if the task is null.Let us see a ...
Read MoreLeft pad a string in Java
To left pad a string, use the String.format and set the spaces.String.format("|%20s|", "demotext")If you add 30 above, it will display the first string after 30 spaces from the beginning.String.format("|%30s|", "demotext")Examplepublic class Demo { public static void main(String []args) { System.out.print(String.format("|%20s|", "demotext")); System.out.println("Left padded!"); } }Output| demotext|Left padded
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