Designed a class SortData that contains the method asec() and desc() in java

import java.util.*;
class prac4A
{
Scanner input=new Scanner(System.in);
int num,i;
int arr[];
int temp=0;
public void getdata()
{
System.out.print("Enter the size of array: ");
num=input.nextInt();
arr=new int[num];
System.out.print("Enter the number: ");
for( i=0;i<num;i++)
{
arr[i]=input.nextInt();
}
}
void putdata()
{
System.out.print("Given numbers are: ");
for(i=0;i<num;i++)
{
System.out.println(arr[i]);
}
}
void asce()
{
for(i=0;i<num;i++)
{
for(int j=i+1;j<num;j++)
{
if(arr[i]>arr[j])
{
temp=arr[i];
arr[i]=arr[j];
arr[j]=temp;
}
}
}
System.out.print("Ascending order of number are: ");
for(int i=0;i<num;i++)
{
System.out.println(arr[i]);
}
}
void desc()
{
for(i=0;i<num;i++)
{
for(int j=i+1;j<num;j++)
{
if(arr[i]<arr[j])
{
temp=arr[i];
arr[i]=arr[j];
arr[j]=temp;
}
}
}
System.out.print("Descending order of number are: ");
for(int i=0;i<num;i++)
{
System.out.println(arr[i]);
}
}
public static void main(String args[])
{
prac4A ob=new prac4A();
ob.getdata();
ob.putdata();
ob.asce();
ob.desc();
}
}