Not compiling cant find the error

#1

import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner sc= new Scanner(System.in);
int n= sc.nextInt();
int[]arr=new int[n];
for(int i=0;i<arr.length;i++){
arr[i]=sc.nextInt();
}
Insertionsort(arr);
display(arr);
}
public static void display(int[]arr){
for(int i=0;i<arr.length;i++){
System.out.println(arr[i]);
}
}
public static void Insertionsort(int[]arr){
for(int counter=1;counter<=arr.length-1;counter++){
int val= arr[counter];
int j= counter-1;
while(arr[j]>val&&j>=0){
arr[j+1]=arr[j];
j–;
}
arr[j+1]=val;
}
}
}

#2

@Shivam_balwani,

Conditions are evaluated left to right.

Initially, for case j=-1 , your code wasn’t evaluating the second condition because the first one was throwing an ArrayIndexOutOfBoundsException exception.

			while (arr[j] > val && j >= 0) {

In the above condition, in case j=-1, arr[-1]>val will be evaluated first and that will give you an OutOfBoundsException run error.

However when you switched the conditions like this:

			while ( j >= 0 && arr[j] > val ) {

then for the same case ( j=-1 ), since first condition becomes false , then regardless of the second value, the whole condition will always be false (because its AND operator); and so the second condition won’t be evaluated and hence no exception in this case.

#3

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