The keyword this is used to refer to the current class object instance
for example: this.getName() refers to the method getName() of the current object instance. Even if there were multiple getName() methods in the parent classes the key word this instructs the JVM to call the method in the current class
In Java, this refers to the current instance of a class. this is most often used in one of two cases:
1) To refer to a variable in a different scope.
class MyClass {
int number = 10;
// Note how the printNumbers method defines a variable of the same name as
// a class member.
void printNumbers() {
int number = 5;
// The output here will be 5, since the "most local" variable reference is used
System.out.println(number);
// The output here will be 10, since we specify that we want the class member
System.out.println(this.number);
}
}
2) To send a reference of the current class to another class or method.
class MyClass {
void f() {
// Send a reference to this class to stdout
System.out.println(this);
}
}
The This keyword references the current object. It can be used in an instance method or constructor for an object.
No, 'check' is not a keyword in java language.
There is no "foreign" keyword in Java, however, there is a native keyword that declares native methods in a native language, such as C or C++.For full list of keywords in Java see related question.
Literal in java are L, F, null, true, false These act as keyword(have special meaning in java) but these does'nt comes under the category of Java Keyword.
sizeof is not a keyword in Java but many classes have size() or length() methods, which can mean the number of elements, characters, etc. depending on the class.
we do it using the throw keyword.
No, 'check' is not a keyword in java language.
yes, float is keyword and data type in java
"verify" is not a Java keyword. I believe the link, in related links, has the complete list of Java keywords.
There is no "foreign" keyword in Java, however, there is a native keyword that declares native methods in a native language, such as C or C++.For full list of keywords in Java see related question.
Literal in java are L, F, null, true, false These act as keyword(have special meaning in java) but these does'nt comes under the category of Java Keyword.
"int" is the keyword for integer
In Java, the final keyword specifies that the object created cannot be further redefined or derived.
sizeof is not a keyword in Java but many classes have size() or length() methods, which can mean the number of elements, characters, etc. depending on the class.
"this" is a Java keyword that references the current object. Any part of the object(instance variables, methods, constructors) can be accessed by calling this.[member].
new is a keyword to create a instance of object any class.
we do it using the throw keyword.
No extern keyword in Java.