Do local variables in Java have default values?

Ali
Ali
Updated on 30-Jul-2019 22:30:20

941 Views

No, local variables do not have default values. Once we create a local variable we must initialize it before using it. Since the local variables in Java are stored in stack in JVM there is a chance of getting the previous value as default value. Therefore, In Java default values for local variables are not allowed. Example public class Sample { public static void main(String args[] ){ int data; System.out.println(data); } } Error C:\Sample>javac Sample.java Sample.java:4: error: variable data might not have been initialized System.out.println(data); ^ 1 error

In SAP Workflow, Binding the receiver dynamically

SAP Expert
Updated on 30-Jul-2019 22:30:20

254 Views

To bind receiver dynamically in Workflow, you have to write a Function Module that will provide you manager name of initiator. This FM should be put in public class to be used in Workflow. The provided value will be saved in any table of HR module.Then you need to call this method from Workflow template. To set binding, you need to pass a value in _WF_INITIATOR._WF_Initiator                    WFSYST-INITIATORUsing _WF_Initiator        Initiator of the workflow (user name).Here “user name” is a fourteen-character field in the structure US.When a workflow is started ... Read More

Values are not readable while calling RFC method in .net via SAP.NET Connector 2.0

John SAP
Updated on 30-Jul-2019 22:30:20

113 Views

Please check if you have same Unicode encoding in SAP and .NET Connector.

Can a final class be subclassed in Java?

Sai Subramanyam
Updated on 30-Jul-2019 22:30:20

2K+ Views

The final modifier for finalizing the implementations of classes, methods, and variables. The main purpose of using a class being declared as final is to prevent the class from being subclassed. If a class is marked as final then no class can inherit any feature from the final class. You cannot extend a final class. If you try it gives you a compile time error. Example final class Super { private int data = 30; } public class Sub extends Super{ } Output C:\Sample>javac Sub.java Sub.java:7: error: cannot inherit from final Super public class Sub extends Super{ ^ 1 error

ABAP constants with %_ as prefix

Nancy Den
Updated on 30-Jul-2019 22:30:20

239 Views

The constants with a value of %_ as prefix are defined in ABAP for its internal use of the system. These needs to be used as such and cannot be modified by the user.

What is the super class of every class in Java?

radhakrishna
Updated on 30-Jul-2019 22:30:20

4K+ Views

The class named Object is the super class of every class in Java. Let’s test it with an example. The java.lang.Class.getSuperclass() returns the Class representing the superclass of the entity (class, interface, primitive type or void) represented by this Class. So, Create a sample concrete class and lets try to get the name of its super class using this method. Example Live Demo public class Test { public static void main(String args[]){ Test obj = new Test(); Class cls = obj.getClass().getSuperclass(); ... Read More

How to declare a local variable in Java?

Johar Ali
Updated on 30-Jul-2019 22:30:20

629 Views

Local variables are declared in methods, constructors, or blocks. Local variables are created when the method, constructor or block is entered and the variable will be destroyed once it exits the method, constructor, or block. A local variable is the one which is declared within a method. The scope of this variable is within the method. Example public abstract class Sample { public static void main(String args[]){ int data = 4044; System.out.println(data); } } Output 4044

What is the scope of public access modifier in Java?

Paul Richard
Updated on 30-Jul-2019 22:30:20

586 Views

The public modifier has the widest scope. When a class or its members declared public they are accessible from everywhere. A default class or its members are available to any other class in the same package. However, if the public class we are trying to access is in a different package, then the public class still needs to be imported. Because of class inheritance, all public methods and variables of a class are inherited by its subclasses. Example The following function uses public access control − public static void main(String[] arguments) { // ... } ... Read More

Error while connecting to SAP server from Java application: java.lang.UnsatisfiedLinkError: no sapjco3 in java.library.path

SAP Developer
Updated on 30-Jul-2019 22:30:20

278 Views

Note that SAP Java Connector should be configured as server library and not as application library.There are many issues in the way you are trying to use:You shouldn’t change java.library.path programmatically as it is not recommended and this is cached at JVM start.You are overwriting java.library.path instead of adding your directory so your application server requires native libraries.Also note that our JVM root directory is different from your application root directory so /WEB-INF/lib path won’t be found by our JVM. 

What is a method signature in Java?

Swarali Sree
Updated on 30-Jul-2019 22:30:20

6K+ Views

The method signature consists of the method name and the parameter list. Example Live Demo public class MethodSignature { public int add(int a, int b){ int c = a+b; return c; } public static void main(String args[]){ MethodSignature obj = new MethodSignature(); int result = obj.add(56, 34); System.out.println(result); } } Output 90 Method ... Read More

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