Java interview programming questions on this keyword part 2

java programming interview questions

Java interview programming questions on this keyword part 2

Kris Kimcil 10.28 Komentar

• Hi friends this is the part 2 of this keyword programming interview questions
• Check this for part 1 Java programming examples programs on this keyword part 1

Java Quiz on this keyword part #2

• Java interview program on this keyword: can we call method using this keyword?

  
Program  #5:

1. Show() method called
2. 1
3. 2

Program #6: Can we call non static method from constructor using this?

1. B class Constructor
2. method

Program #7: Can we assign something to this ?

1. package thiskeywordinterviewprograms.java;
2. public class ThisDemo {
3.  
4.     int a;
5.     int b;
6.     
7.  ThisDemo(int x, int y){
8.  
9.        this= new ThisDemo();
10.         System.out.println("Two argument constructor called.");
11.         this.x=x;
12.         this.y=y;
13.         
14. }
15.  
16. public static void main(String[] args) {
17.         
18.     ThisDemo obj = new ThisDemo(10, 20);
19.         
20.      System.out.println(obj.a);
21.      System.out.println(obj.b);
22. 
    
23. }
24.  
25. }

1. Compile Time Error at line number 9: left hand side of assignment must be a variable
2. We can not modify or assign something to this it leads to compile time error

Program #8 : Can we use this as return statement in a method?

1. public class B{
2. 
   
3.    int a;
4.     
5.  public int getA() {
6.         return a;
7.  }
8.  
9. public void setA(int a) {
10.         this.a = a;
11. }
12.  
13. B show(){
14.     return this;
15. }
16.  
17. public static void main(String[] args) {
18.        
19.  B obj = new B();
20.  
21.   obj.setA(10);
22.  
23.  System.out.println(obj.getA());
24.  B obj2= obj.show();
25.  System.out.println(obj2.getA());
26.  
27. }
28. 
    
29. }

1. 10
2. 10

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Java Interview programming questions on this keyword

java programming interview questions

Java Interview programming questions on this keyword

Kris Kimcil 09.18 Komentar

• Lets discuss some interesting programs on this keyword.
• Now its time to practice some programs on this keyword. 
• Try to guess the output of the following java programming questions on this keyword.
• If you want explanations for all the programs please go through this keyword interview questions on java

Java Quiz on this keyword part #1

Program #1: Java interview programming question on this keyword.

1. package thiskeywordinterviewprograms.java;
2. public class ThisDemo {
3.  
4.     int a;
5.     int b;
6.     
7. ThisDemo(int a, int b){
8.  
9.     a=a;
10.     b=b;
11.         
12. }
13.  
14. public static void main(String[] args) {
15.         
16.     ThisDemo obj = new ThisDemo(10, 20);
17.         
18.      System.out.println(obj.a);
19.      System.out.println(obj.b);
20. 
    
21. }
22.  
23. }

1. 0
2. 0

Program #2: Java interview programming question on this keyword.

1. package thiskeywordinterviewprograms.java;
2. public class ThisDemo {
3.  
4.     int a;
5.     int b;
6.     
7. ThisDemo(int a, int b){
8.  
9.     this.a=a;
10.     this.b=b;
11.         
12. }
13.  
14. public static void main(String[] args) {
15.         
16.     ThisDemo obj = new ThisDemo(10, 20);
17.         
18.      System.out.println(obj.a);
19.      System.out.println(obj.b);
20. 
    
21. }
22.  
23. }

1. 10
2. 20

Program #3: Java Interview programming example on this keyword.

• What will be the output of the below program

1. package thiskeywordinterviewprograms.java;
2. public class ThisDemo {
3.  
4.     int a;
5.     int b;
6.     
7. ThisDemo(int a, int b){
8.  
9.     this.a=a;
10.     this.b=b;
11.         
12. }
13.  
14. public static void main(String[] args) {
15.         
16.     ThisDemo obj = new ThisDemo();
17.         
18.      System.out.println(obj.a);
19.      System.out.println(obj.b);
20. 
    
21. }
22.  
23. }

Program #4: Java interview programming question on this keyword.

1. Zero argument constructor called.
2. Two argument constructor called.
3. x=1
4. y=2

Interview Programming questions on this keyword part 2

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