Answer Posted / ranganathkini

The 'this' keyword in Java has the following uses:

1. To resolve ambiguity where a local variable hides a class
member. Example:

class MyClass {
private int value;

public MyClass( int value ) {
// local variable 'value' hides class field 'value'
this.value = value;
}
}

2. To invoke one constructor overload from another. Example:

class MyClass {
private int value;

public MyClass( int value ) {
this.value = value;
}

public MyClass() {
// invoke MyClass( int value )
this( 0 );
}
}

3. To pass the current object instance as a parameter to a
method. Example:

class MyClass {
private int value;

public MyClass( int value ) {
this.value = value;
// pass current instance as a parameter to the method
displayValue( this );
}

public static void displayValue( MyClass mc ) {
System.out.println( "Value = " + mc.value );
}
}

4. To invoke an outer class's non-static method from a
non-static inner class. Example:

class MyOuterClass {

class MyInnerClass {
public MyInnerClass() {
// call the outer class's method
MyOuterClass.this.displayText( "Inner instance
created" );
}
}

public void displayText( String text ) {
System.out.println( text );
}
}

What are runtime exceptions?

1166

---

Can we create constructor in abstract class ?

1065

---

What are peerless components?

1096

---

Can we use this () and super () in a method?

980

---

What is update method called?

1167

---

What is a double vs float?

1022

---

What is the collections api in java programming?

985

---

Which oo concept is achieved by using overloading and overriding?

1017

---

How to split arraylist elements in java?

1185

---

What is assembly used for?

1024

---

Is arraylist dynamic in java?

1001

---

Can you call one constructor from another if a class has multiple constructors?

1042

---

What is final variable?

951

---

What is the range of a character variable?

995

---

What are the rules for variable declaration?

975

---