class lala{

	public static void invierte(char[] Arr,char[] Err ){
	
		int n,i;
		n=Arr.length;
		i=0;
		while (i<n){
			Arr[i]=Err[n];
			i++;
					
		}
	}
	public static void main(String[] arg){
		char[] A=new char[5];
		A[0]='a';
		A[1]='b';
		A[2]='c';
		A[3]='d';
		A[4]='e';
		int x=A.length;
		char[] B=new char[x];
		invierte(A,B);
		int o=0;
		while(o<x){
			System.out.println(B[o]);
			o++;
		}
		
	}
}

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 5
    at lala.invierte(lala.java:9)
    at lala.main(lala.java:23)

class lala{

	public static void invierte(char[] Arr,char[] Err ){
	
		int n,i,e;
		n=Arr.length-1;
		i=0;
		e=n;
			while (i<=n){
			Err[i]=Arr[e];
			i++;
			e=e-1;
					
		}
	
	}
	public static void main(String[] arg){
		char[] A=new char[6];
		A[0]='a';
		A[1]='b';
		A[2]='c';
		A[3]='d';
		A[4]='e';
		A[5]='f';
		char[] B=new char[6];
		invierte(A,B);
		int o=0;
		while(o<6){
			System.out.println(B[o]);
			o++;
		}
		
	}
}

n=Arr.length;

class lala{

	public static void inicia(int[] Arr){
	
		
		int n,i,j;
		n=Arr.length;
		i = 0;
		j = 0;
		while (i<n){
			Arr[i]=j;
			i++;
			j=j+4;
			}
			}
	public static void main(String[] arg){
		int[] A=new int[5];
		inicia(A);
		int u,o;
		o=A.length;
		u=0;
		while (u<o){
			System.out.println(A[u]);
			u++;
		}
		}
		}