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Hence, if we pass any other data type instead of int, the compiler will throw an error. It is because Java is a strongly typed language. Note: The argument 24 passed to the display2() method during the method call is called the actual argument. The parameter a accepted by the method ...
The annotation forces the Java compiler to indicate that the interface is a functional interface. Hence, does not allow to have more than one abstract method. However, it is not compulsory though. In Java 7, functional interfaces were considered as Single Abstract Methods or SAM type. SAMs ...
However, the Java compiler can automatically convert objects into corresponding primitive types. For example, Integer aObj = Integer.valueOf(2); // converts into int type int a = aObj; Double bObj = Double.valueOf(5.55); // converts into double type double b = bObj; This process is...
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import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; class Main { public static void main(String[] args) { int data1 = 5; String data2 = "This is programiz"; try { FileOutputStream file = new FileOutputStr...