Technology Zone

[dirky00018]

hi... can anybody please help me how to sort numbers in java?? you know, smallest to biggest numbers?? and vise versa...

[garbett1]

well your best bet is to make a tree set then make a comparable method to sort then
for the comparable use:

public interface Comparable<int>{
public int compareTo(int a);
}

then for the class

public class anyClass implements Comparable<int>{
int[] myInts = (//add all the ints you want to sort here);
public int compareTo(int a){
return (this - int); //you can choose whatever you want
}
public static void main(String[] args) {
Collection myCollection = new TreeSet()<int>;
for(int int1 : myInts){
myCollection.add(int1);
}for(int int2 : myCollection){
System.out.println(int2);
}
}
}
that should work if not just tweak the compare to method till it does if the int doesnt work just change the <int> to <Integer> what u want hope that helped also look at:
Java 2 Platform SE v1.3.1: Interface Comparable

[dirky00018]

uhmm.. sorry if im noob but i really dont understand your solution.. im still a begginer with java.. i still dont know what interface is.. let me just show you the problem. its simple for advance programmers..

problem:
make a program that will ask the user to enter 5 numbers. store it in a array and output the ff:
1.) maximum number
2.) minimum number
3.) sorted array

i already got the minimum and maximum. my problem is the sorting... hope someone can help..

[garbett1]

hmmm well look on wikipedia about bubble sort that will probably help you if you cant figure it out pm me

-----------------This post was merged together. In future use the edit button.-----------------

[dirky00018]

BTW, i got the solution.. i used bubble sorting..
thanks for the help though..

im posting the solution.. hope this would help noobs like me in the future..

Originally Posted by finding maximum and minimum value in an array and sorting

public static void main(String[] args) {
BufferedReader a = new BufferedReader (new InputStreamReader(System.in));
String temp = "";
int size = 5;
int num[] = new int[size];
int max=0;
int min;
int t=0;


System.out.println("Enter 5 numbers: ");

for(int i=0; i<size; i++)
{
try
{
temp=a.readLine();
}
catch(IOException a1){}
try
{
num[i] = Integer.parseInt(temp);
}
catch(NumberFormatException a1)
{
System.out.println("numbers only!!");
}
}

//maximum
for(int i=0; i < size; i++)
{
if(num[i] > max)
max = num[i];
}
System.out.println("The maximum number is: " + max);



//minimum
min = num[0];
for(int i=0; i < size; i++)
{
if (num[i] < min)
min = num[i];
}
System.out.println("The minimum number is: " + min);




//sorting

for (int x=1; x <size; x++)
for(int b=size-1; b>=x; b--)
{
if(num[b-1]>num[b]) //if out of order
{
t=num[b-1]; //exchange of numbers
num[b-1]=num[b];
num[b]=t;
}
}


System.out.println("The sorted array is: ");
for(int i=0; i<size;i++)
{
System.out.println(num[i]);
}
}
}

hope this helps others..