This is the 26th day of my participation in the August More Text Challenge

Difficulty level: Easy

The program

Program a

1) What is the output of the following program?

public class Test
{
	public int getData(a) //getdata 1
	{
		return 0;
	}
	public long getData(a) //getdata 2
	{
		return 1;
	}
	public static void main(String[] args)
	{
		Test obj = newTest(); System.out.println(obj.getData()); }}Copy the code

A) 1 B) 0 C) runtime error D) compile error

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Program 2

2) What is the output of the following program?

public class Test
{
	public int getData(String temp) throws IOException
	{
		return 0;
	}
	public int getData(String temp) throws Exception
	{
		return 1;
	}
	public static void main(String[] args)
	{
		Test obj = new Test();
		System.out.println(obj.getData("HY")); }}Copy the code

A) 0 B) 1 C) compile error D) runtime error

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Application of three

3) What is the output of the following program?

public class Test
{
	private String function(a)
	{
		return ("HY");
	}
	public final static String function(int data)
	{
		return ("haiyong");
	}
	public static void main(String[] args)
	{
		Test obj = newTest(); System.out.println(obj.function()); }}Copy the code

A) compiler error B) runtime error C) HY d) none

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Application of four

4) What is the output of the following program?

public class Test
{
	private String function(String temp, int data)
	{
		return ("HY");
	}
	private String function(int data, String temp)
	{
		return ("haiyong");
	}
	public static void main(String[] args)
	{
		Test obj = new Test();
		System.out.println(obj.function(4."HY")); }}Copy the code

A) HY B) haiyong C) compiler error D) runtime error

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Application of five

5) What is the output of the following program?

public class Test
{
	private String function(String temp, int data, int sum)
	{
		return ("HY");
	}
	private String function(String temp, int data)
	{
		return ("haiyong");
	}
	public static void main(String[] args)
	{
		Test obj = new Test();
		System.out.println(obj.function("HY".0.20)); }}Copy the code

A) HY B) compiler C) runtime D) haiyong

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6) What is the output of the following program?

public class Test
{
	private String function(float i, int f)
	{
		return ("hy");
	}
	private String function(double i, double f)
	{
		return ("HY");
	}
	public static void main(String[] args)
	{
		Test obj = new Test();
		System.out.println(obj.function(1.0.20)); }}Copy the code

A) HY B) compiler error C) runtime error D) HY

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The second part is the output and analysis of the program

Output and parsing

Program one output

The answer:

d
Copy the code

Description:

For method overloading, methods must have different signatures. The return type of the method does not contribute to the different method signatures, so the code above gives a compilation error. Getdata 1 and getData 2 differ only in the return type and the NOT signature.

Program two output

The answer:

c
Copy the code

Description:

Methods that throw different exceptions are not overloaded because they still have the same signature.

Program three output

The answer:

c
Copy the code

Description:

Access modifiers associated with methods do not determine the criteria for overloading. Overloaded methods can also be declared final or static without affecting the overloaded criteria.

Procedure 4 Answer

The answer

b
Copy the code

Description:

The order of arguments is an important parameter in determining method overloading. Methods are overloaded because of the order of attributes.

Procedure 5 Answer

The answer:

a
Copy the code

Description:

The order of arguments is an important parameter in determining method overloading.

Procedure 6 Answer

The answer:

a
Copy the code

Description:

This is really easy. Different types of parameters can lead to method overloading because the signature of a method changes with different types of attributes. Any method that matches the set of arguments passed in the main function is called. In this case, the first argument passed is double, so print HY.

That’s all for this article

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