Found 9326 Articles for Object Oriented Programming

Just split the string based on space and then iterate it. See the example below −Examplepublic class Tester {    public static void main(String[] args) {       String test = "I love learning Java";       String[] subStrings = test.split(" ");       for(String subString: subStrings) {          System.out.println(subString);       }    } }OutputI love learning Java

Following example shows how to loop through an array using a foreach loop.public class Tester {    public static void main(String[] args) {       int[] dataArray = {1, 2, 3, 4};       for(int i: dataArray) {          System.out.println(i);       }    } }

https://www.tutorialspoint.com/javaexamples/string_compare.htm

Yes, Storing password in String object is not safe for following reasons −String objects are immutable and until garbage collected, they remain in memory.String being plain text can be tracked in memory dump of the application.In log, String based password may be printed which can cause a problem.Char[] can be cleared or wiped out after the job is done.

Annotations provide information about java elements. Annotations can be interpreted by compiler or IDE at compile time or by JVM at runtime. Annotations can be usedto show attributes of an element: e.g. @Deprecated, @Override, or @NotNullto describe the purpose of an element of the framework, e.g. @Entity, @TestCase, @WebServiceto describe the behavior of an element: @Statefull, @TransactionBefore Java 5, XML was primarily used to store information about java objects, with annotations, this information can be stored within the java code itself.

Following are the steps to use native methods.Create a header file (.h file) for a CPP program.Create CPP fileCreate a DLLIn java code, declare the method as native, load the DLL using System.loadLibrary() method and call the method.

Native methods are written in a different language than java and are declared as native in Java.

The native keyword is used to declare a method as native. It means that method implementation is present in the different language.

Following example is converting a String to int.ExampleLive Demopublic class Tester {    public static void main(String[] args) {       String intString = "1234";       int value = new Integer(intString).intValue();       System.out.println(value);    } }Output1234

You can use JSTL, JSP Standard Tag Library or EL, Expression Language to avoid scriptlets.