In this tutorial we will see what is java boolean default value . In this example we will write a java program that creates unassigned boolean variable / Boolean variable and check default value of boolean in java .
Note : The Default value of boolean is false and wrapper class Boolean is null.
Java Program To Find Java boolean default value
Now we will write a program to check default boolean value in java.
public class DefaultBooleanValue {
boolean defaultBoolean;
Boolean defaultBooleanWrapper;
public static void main(String[] args) {
DefaultBooleanValue defaultBooleanValue = new DefaultBooleanValue();
defaultBooleanValue.printBooleanDefaultValues();
}
public void printBooleanDefaultValues() {
//print value of boolean
System.out.println("Default value of boolean: " + defaultBoolean);
//print value of Boolean
System.out.println("Default value of Boolean(Wrapper): "
+ defaultBooleanWrapper);
}
}
Output :
Default value of boolean: false
Default value of Boolean(Wrapper): null
The output of this example makes clear that The Default value of boolean is false and wrapper class Boolean is null .
Lets be sure about it. We will now create few more boolean and Boolean variables and we will print java boolean default value and see the output.
public class DefaultBooleanValue2 {
boolean defaultBoolean1;
Boolean defaultBooleanWrapper1;
boolean defaultBoolean2;
Boolean defaultBooleanWrapper2;
public static void main(String[] args) {
DefaultBooleanValue2 jbd = new DefaultBooleanValue2();
jbd.printBooleanDefaultValues();
}
public void printBooleanDefaultValues() {
//print value of boolean
System.out.println("Default value of boolean: " + defaultBoolean1);
System.out.println("Default value of boolean: " + defaultBoolean2);
//print value of Boolean
System.out.println("Default value of Boolean(Wrapper): "
+ defaultBooleanWrapper1);
System.out.println("Default value of Boolean(Wrapper): "
+ defaultBooleanWrapper2);
}
}
Output :
Default value of boolean: false
Default value of boolean: false
Default value of Boolean(Wrapper): null
Default value of Boolean(Wrapper): null
Now it is sure that The Default value of boolean is false and wrapper class Boolean is null .
In this tutorial we learned about default value of boolean in java . We have written two program to check default boolean value java . You can learn more interesting java program for practice .