How to use return value in another method java

How do you return a value from another method in Java?

Java is pass-by-value. That means pass-by-copy

  1. Declare an int variable and assign it the value ‘7’. The bit pattern for 7 goes into the variable named x.
  2. Declare a method with an int parameter named z.
  3. Call the go() method, passing the variable x as the argument. …
  4. Change the value of z inside the method.

Is it possible to return two values from a method in Java?

As per Java Language Specification, the methods in Java can return only one value at a time. So returning multiple values from a method is theoretically not possible in Java.

How do you return a method in Java?

Simply encapsulate it into a class: public class MyFunction implements Function<T, R> { public R apply(T obj) { // do what you need to get R out of T return R; } }; Then you can use the class in client code like this: Function<T, R> TransformFunction = new MyFunction();

How do I go back to the main method in Java?

When you execute a method or code block from main method, your program will go to the method and then it will come back.

For example,

  1. public class Main{
  2. public static void main(String[] args) {
  3. firstMethod();
  4. // when firstMethod execution is finished, the secondMethod will start.
  5. secondMethod();
  6. }
  7. }

How can you retrieve a value from a method?

You declare a method’s return type in its method declaration. Within the body of the method, you use the return statement to return the value. Any method declared void doesn’t return a value. It does not need to contain a return statement, but it may do so.

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How do you return a value from one class to another in Java?

You have to create an object of the called class in the caller class, and use it to access the variable of the called class.

  1. class A {
  2. int a = 10;
  3. }
  4. public class B{
  5. public static void main (String args[]){
  6. A a = new A();
  7. System.out.println(“I live in A ” + a.a);
  8. }

Can a method return two values?

You can return only one value in Java. If needed you can return multiple values using array or an object.

How do you return a long value in Java?

longValue() is an inbuilt method of the Long class in Java which returns the value of this Long object as a long after the conversion. Parameters: This method do not take any parameters. Return Value: This method will return the numeric value represented by this object after conversion to long type.

Can we return array in Java?

We can return an array in Java from a method in Java. Here we have a method createArray() from which we create an array dynamically by taking values from the user and return the created array.

What is the purpose of return in Java?

return is a reserved keyword in Java i.e, we can’t use it as an identifier. It is used to exit from a method, with or without a value. return can be used with methods in two ways: Methods returning a value : For methods that define a return type, return statement must be immediately followed by return value.

Can a for loop return a value?

A return statement is NOT for returning a value from a loop. If you want to preserve a value from a loop, that value needs to be stored in a variable that was created before the loop was started.

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Can you return a string in Java?

There’s no problem with returning Strings in this manner. In Java, a String is a reference to an immutable object.

What can be the return type of main method?

Whenever you execute a program in Java, the JVM searches for the main method and starts executing from it. You can write the main method in your program with return type other than void, the program gets compiled without compilation errors. … If such a method is not found, a run time error is generated.

What is String [] args in Java?

String[] args means an array of sequence of characters (Strings) that are passed to the “main” function. This happens when a program is executed. Example when you execute a Java program via the command line: java MyProgram This is just a test.21 мая 2009 г.

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