Create a tree class in java

Question

0.00/5 (No votes)

See more:

1. Create a class Tree that contains the following:
• 2 private instance variables corresponding to name (e.g. birch, oak, walnut, etc.) and age (e.g. 123, 16, 223, etc.).
• A constructor that allows the 2 instance variables to be initialised to custom values. If a negative value is passed for age, it should print a message that it does not allow negative values (or similar), otherwise, it should allow all instance variables to be initialised.
• 2 set methods that allow each of the instance variables to be modified to a custom value. In the case of the age setter, if a negative value is passed, it should print a message that it does not allow negative values (or similar), otherwise, it should allow that variable to be changed.
• 2 get methods that allow you to access each of the instance variables.
• A method called printDetails that prints the values of the 2 instance variables.

What I have tried:

Java

public class Tree{
	private String name;
	private int age;

	public Tree(){
			treeName = "a type of tree";
			age = "age of tree";
	}

	public Tree(String treeName, int age,){
			treeName = aName;
			age = age;

	}

Posted 11-Apr-18 0:48am

Member 13773814

Updated 11-Apr-18 1:33am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2018-04-11T01:34:00

What I've you tried is wrong.

Quote:
public Tree(){
treeName = "a type of tree";
age = "age of tree";
}

Should be

Java

public Tree(){
			name = "a type of tree";
			age = 0; // or whatever (positive) int value
	}

Quote:
public Tree(String treeName, int age,){
treeName = aName;
age = age;

}

should be something like:

Java

public Tree(String name, int age )
{
  this.name = name;
  setAge(age);
}

With

Java

public void setAge(int age)
{
  if (age >= 0)
  {
    this.age = age;
  }
  else
  {
    System.out.println("age must be greater than (or equal to) 0");
  }
}

I suppose you're now able to complete the task.