Java Boolean
Java Tutorial » Java Boolean
In Java, the boolean keyword it is used to store only two possible values, as:
TRUE / FALSE or
YES / NO
Its default value is "false".
Boolean data type in Java, can take one of this value: true or false.
Boolean Values, example
Type boolean is used with the boolean keyword and it can have only one of this values: true or false:
Example:
I like Java: true
It is warm in winter: false
public class Main {
public static void main(String[] args) {
boolean i_like_java = true;
boolean is_warm_in_winter = false;
System.out.println("I like Java: " + i_like_java);
System.out.println("It is warm in winter: " + is_warm_in_winter);
}
}
Output:public static void main(String[] args) {
boolean i_like_java = true;
boolean is_warm_in_winter = false;
System.out.println("I like Java: " + i_like_java);
System.out.println("It is warm in winter: " + is_warm_in_winter);
}
}
I like Java: true
It is warm in winter: false
Boolean Expression
In Java Boolean expression is an expression that returns Boolean value like: true or false.
For next esample we use an operator, as "the greater than" (>) operator to find out if an variable or expresion is true or false:
Example: use the + method
false
public class Main {
public static void main(String[] args) {
int x = 20;
int y = 18;
boolean a1 = true;
boolean a2 = false;
if (x < y) {
System.out.println(a1);
}
else
{
System.out.println(a2);
}
}
}
Output:public static void main(String[] args) {
int x = 20;
int y = 18;
boolean a1 = true;
boolean a2 = false;
if (x < y) {
System.out.println(a1);
}
else
{
System.out.println(a2);
}
}
}
false
Java Boolean default value, to string, operators, class, to int, vs boolean, null, ejemplo, array, type, true false, method
Java Boolean - java
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