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Interesting facts about Increment and Decrement operators in Java
There are many interesting facts with respect to increment and decrement operators in Java. We will discuss a few of them with examples −
The increment and decrement operators can’t be used with the ‘final’ variables. This is due to the fact that variables associated with ‘final’ keyword can’t be changed −
Example
public class Demo{
public static void main(String[] args){
final int my_val = 34;
int my_val_2 = ++my_val;
System.out.println("The value is :");
System.out.println(my_val_2);
}
}Output
/Demo.java:6: error: cannot assign a value to final variable my_val int my_val_2 = ++my_val; ^ 1 error
Nesting the ‘++’ and ‘- -‘ operator isn’t possible or rather not allowed.
Example
public class Demo{
public static void main(String[] args){
int my_val_1 = 99;
int my_val_2 = ++(++my_val_1);
System.out.println("The value is ");
System.out.println(my_val_2);
}
}Output
/Demo.java:6: error: unexpected type
int my_val_2 = ++(++my_val_1);
^
required: variable
found: value
1 error
Updated on: 04-Jul-2020
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