Java - Programa de consulta

import java.util.Scanner;

public class JavaApplication8 {

    public static void main(String[] args) {

       Scanner entrada=new Scanner (System.in);

       int num[]=new int[20];

       int x;

       for (int x=0 ; x<=19 ; x++){

       System.out.println("INGRESE UN NUMERO");

       num[x] = entrada.nextInt();

       int inver =0;

       inver = num[x];

       for (x=0 ; x<=20 ; x++);

       inver=num[x]*-1 ;

       System.out.println("INVER");

       }

    }

Scanner entrada=new Scanner (System.in);

int num[]=new int[20];

int x;

for (int x=0 ; x<=19 ; x++){

System.out.println("INGRESE UN NUMERO");

num[x] = entrada.nextInt();

}

System.out.println("PARES");

int inver =0;

for (x=0 ; x<20 ; x++){

inver=num[x] ;

if(inver % 2==0)

System.out.println(inver);

}

System.out.println("IMPARES");

for (x=0 ; x<20 ; x++){

inver=num[x] ;

if(inver % 2==1)

System.out.println(inver);

}