OCA Java SE 8 Method - OCA Mock Question Method 7

• « Previous
• Next »

Question

What is the result of the following statements?

     1:  public class Main { 
     2:    public void print(byte x) { 
     3:      System.out.print("byte"); 
     4:    } 
     5:    public void print(int x) { 
     6:      System.out.print("int"); 
     7:    } 
     8:    public void print(float x) { 
     9:      System.out.print("float"); 
     10:   } 
     11:   public void print(Object x) { 
     12:     System.out.print("Object"); 
     13:   } 
     14:   public static void main(String[] args) { 
     15:     Main t = new Main(); 
     16:     short s = 12; 
     17:     t.print(s); 
     18:     t.print(false); 
     19:     t.print(6.7); 
     20:   } 
     21: } 

1. bytefloatObject
2. intfloatObject
3. byteObjectfloat
4. intObjectfloat
5. intObjectObject
6. byteObjectObject

Answer

Note

s is a short and can be promoted to an int, so print() on line 5 is invoked.

line 18 invokes a boolean. It is autoboxed to a boolean, so print() on line 11 is invoked.

line 19 is a double and is autoboxed to a double, so print() on line 11 is invoked.

public class Main {
  public void print(byte x) {
    System.out.print("byte");
  }/* w w  w  . j  a  v a  2s.  c o m*/

  public void print(int x) {
    System.out.print("int");
  }

  public void print(float x) {
    System.out.print("float");
  }

  public void print(Object x) {
    System.out.print("Object");
  }

  public static void main(String[] args) {
    Main t = new Main();
    short s = 1;
    t.print(s);
    t.print(true);
    t.print(6.7);
  }
}

• Next »
• « Previous