Download Java This and Super

Java This and Super
this
The current class instance. Can be used with variables (line 6) or
methods (line 10).
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class Numbers {
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private int aNumber = 42;
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public int returnANumber()
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{
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return this.aNumber;
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}
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public int returnANumber(int intIn)
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{
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return (intIn * this.returnANumber());
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}
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public static void main(String[] args) {
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Numbers numberTest = new Numbers();
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System.out.println("The Number is " +
numberTest.returnANumber() );
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//output is: The Number is 42
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System.out.println("The Number is " +
numberTest.returnANumber(2) );
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//output is: The Number is 84
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}
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}
super
Used to specify methods in the parent class.
class Cat {
public String name;
public Cat() {name = "no nameIn";}
public Cat(String nameIn) {name = nameIn;}
public String getName() {
return(name + " the Cat");
}
}
class Himalayan extends Cat {
public Himalayan() {}
public Himalayan(String nameIn) {
name = nameIn;
}
public String getName() {
return (name + " the Himalayan");
}
public String getNameAsCat() {
return super.getName();
}
public static void main(String[] args) {
Himalayan cappuccino = new Himalayan("Cappuccino");
System.out.println("The Himalayan name is " +
cappuccino.getName() );
//output is: The Himalayan name is
//
Cappuccino the Himalayan
System.out.println("The Cat name is "
+ cappuccino.getNameAsCat() );
//output is: The Cat name is
//
}
}
Cappuccino the Cat