How to return boolean in java

What does a Boolean method return?

Writing a Boolean Method

Writing a method that returns a boolean is just like writing any method with a return value, but ultimately we are just returning either true or false. For example, suppose we are writing code for a hybrid-electric car.

How do you return a Boolean value in Java?

Example 1

  1. public class BooleanEqualsExample1 {
  2. public static void main(String[] args) {
  3. Boolean b1 = new Boolean(true);
  4. Boolean b2 = new Boolean(false);
  5. // method will give the result of equals method on b1,b2 to b3.
  6. if(b1.equals(b2)){
  7. System.out.println(“equals() method returns true”);
  8. }

How do you return a Boolean and a string in Java?

toString(boolean b) returns a String object representing the specified boolean. If the specified boolean is true, then the string “true” will be returned, otherwise the string “false” will be returned.

Can you return a method in Java?

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.

Is if a Boolean operator?

Examples of Boolean operators in the IF statement

The IF statement will be successful if the comparisons of the first three expressions evaluate to TRUE, or if expressions four or five evaluate to TRUE.

How do I make a boolean?

In Java, there is a variable type for Boolean values:

  1. boolean user = true; So instead of typing int or double or string, you just type boolean (with a lower case “b”). …
  2. boolean user = true;
  3. if ( user == true) { System.out.println(“it’s true”); …
  4. boolean user = true;
  5. if ( ! user ) { …
  6. if ( ! user ) {
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What is Boolean example?

A Boolean variable has only two possible values: true or false. … In this example, when the boolean value “x” is true, vertical black lines are drawn and when the boolean value “x” is false, horizontal gray lines are drawn.

What is the Boolean method?

Boolean, or boolean logic, is a subset of algebra used for creating true/false statements. Boolean expressions use the operators AND, OR, XOR, and NOT to compare values and return a true or false result. … x AND y – returns True if both x and y are true; returns False if either x or y are false.

Can Boolean be null in Java?

A boolean cannot be null in java. A Boolean , however, can be null . If a boolean is not assigned a value (say a member of a class) then it will be false by default. The only thing that can be a null is a non-primivite.

Can we convert boolean to string in Java?

We can convert boolean to String in java using String. valueOf(boolean) method. Alternatively, we can use Boolean. toString(boolean) method which also converts boolean into String.

Can a method 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.

Is Boolean a string?

The Boolean class wraps a value of the primitive type boolean in an object. An object of type Boolean contains a single field, whose type is boolean. In addition, this class provides useful methods like to convert a boolean to a String and a String to a boolean, while dealing with a boolean variable.

What is return in Java?

The return keyword is used to return from a method when its execution is complete. When a return statement is reached in a method, the program returns to the code that invoked it. A method can return a value or reference type or does not return a value.

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What does return 0 do in Java?

A return code of a program was used for the control flow. Return code 0 meaning everything okay, non-zero for errors. So the C int main(…) is a direct mapping, and return 0; at the end appropiate. An exit there is like throwing an exception, bypassing any return.

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