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Thread: need help in creating array with multiple data type in java

  1. #1
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    Default need help in creating array with multiple data type in java

    i am complete beginner, i use eclipse.
    i need to create an array with attributes name, gender, phone, age.
    and then sort acording to age in ascending order.

    i created like this,
     public class Array{  
        	private String[] name={"ram", "katy", "priti", "john"};
        	private String[] gender={"male","female","female","male"};
        	private int[] phone={989898089,89898989,8982989089,898908989};
        	private int[] age={45,24,30,28};
     
     
        	public void printarray(){
        		for(int i=0;i<=4;i++)
        			System.out.printf("%s %s %d %d \n",name[i],gender[i],phone[i],age[i]);
     
     
        		// sorting 
        	for(int i=0; i<4;++i)
            {
     
        	for(int j=i+1; j<5; ++j)
        			{
        				if(age[i]>age[j])
                           {
        	                int a =  age[i];
     
        	                age[i] = age[j];
     
        	                age[j] = a;	
        		        }
     
        			}
     
     
        		}
        	    for (int i = 0; i < 5; ++i){
     
        	    	System.out.printf("%s %s %s %d \n",name[i],gender[i],mail[i],marks[i]);
        	    }
     
     
     
        	}
        }
    This code sorts the age attribute alone and when printing ouput it swaps one person's age to other person, how to make it correct
    Last edited by jakeaustin; October 10th, 2014 at 05:23 AM.


  2. #2
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    Default Re: need help in creating array with multiple data type in java

    Well, you want to sort the 4 attributes, so when you loop through the ages, why do you only move the age? Why not move the values in the other 3 arrays as well?

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    Default Re: need help in creating array with multiple data type in java

    it worked, thanks..

    is it possible to make custom array lik this book b1=new book(101,"katy","age"); where 101 should be stored in int roll no;
    katy in string name and age in int age

    --- Update ---

    it worked, thanks..

    is it possible to make custom array lik this book b1=new book(101,"katy","age"); where 101 should be stored in int roll no;
    katy in string name and age in int age
    and how to sort age if i give like this

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    Default Re: need help in creating array with multiple data type in java

    Yes, but you have a bit to learn first, below is some example code for you to peruse. See how much you can understand. Have a look on google for ' java objects' and read around. If you have questions, post, but I will probably redirect you to a website with an explanation

    public class Untitled 
    {
    	public static void main(String[] args) 
    	{
    		Person[] listOfPeople = new Person[2];
    		listOfPeople[0] = new Person("Bill", "Male");
    		listOfPeople[1] = new Person("Andy", "Male");
     
    		System.out.println(listOfPeople[0]);
                    System.out.println(listOfPeople[0].name);
    	}
    }
     
    class Person
    {
    	public String name, gender;
     
    	Person(String name, String gender)
    	{
    		this.name = name;
    		this.gender = gender;
    	}
     
    	public String toString()
    	{
    		return "Name: "+name+", gender: "+gender;
    	}
    }

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    Default Re: need help in creating array with multiple data type in java

    Welcome to the Forum! Please read this topic to learn how to post code correctly and other useful tips for newcomers.

    Please post your code correctly per the above link.

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    Default Re: need help in creating array with multiple data type in java

    ok, done.

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    Default Re: need help in creating array with multiple data type in java

    is it possible to make custom array lik this book b1=new book(101,"katy","age");
    This is not suggesting a "custom array" but a class of your design called "Book", not "book". In Java, class names begin with capital letters (for a good reason, mostly convention). Then,

    Book b1 = new Book(101,"katy","age");

    calls a Book() constructor with the parameters 101, "katy", and "age" that can be used as you described. You might want to review the tutorial Providing Java Constructors. . . .

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