programm to reading values from keyboard into an arraylist untill 'z' keyword enterd, stops reading and than sorting them in ascending order.

import java.io.*;
import java.util.*;

public class ArraysOne {

public static void main(java.lang.String[] args) 
{
//int i;
ArrayList al=new ArrayList();
try{
Scanner input = new Scanner(System.in);

int check=0;
while(true){
check = input.nextInt();
if(check == 'z' || check=='Z') break;
al.add(check);
}

} catch(Exception e){
e.printStackTrace();}

Iterator itr=al.iterator();
while(itr.hasNext()){
Object i=itr.next();
System.out.println(i);
}
int j=al.size();
System.out.println("Size"+j);

Collections.sort(al);
System.out.println("ArrayList is sorted");

for(Integer temp: al){
System.out.println(temp);

}
/*for(int i=j;i>=i-1;i--){
for(int k=i-1;k>=;k--){
if(al.get(i)al.get(k)){
System.out.println(al.get(k));}
else{ System.out.println(al.get(i));}
}
}*/

}

}

Adding two Arrays and finding the third array is positive or negative???

import java.util.*;
import java.lang.*;
import java.io.*;
class AddArrays1
{
public static void main(String[] args)
{
//Scanner sc=new Scanner(System.in);

int a[]={1,2,3};
int b[]={2,3,-4};
int c[]=new int[3];
for(int i=0;i{
c[i]=a[i]+b[i];
System.out.println(c[i]);
}
for (int i=0; i{
if (c[i] > 0) {
System.out.println(c[i]+ " is positive");
} else {
System.out.println(c[i] + " is not positive");
}
}
}
}