import java.util.Scanner;
public class getArray{
   public static void main (String[] args){
   Scanner scnr = new Scanner(System.in);
   int[]newArray = new int[20];
   int newArraySize = 0;   
   while (scnr.hasNextInt()){
      newArray[newArraySize] = scnr.nextInt();
      newArraySize += 1;
      continue;
      }
   for (int i = 0; i < newArraySize; i++){
   System.out.println("The " + i + " input is " + newArray[i]);
   } 
 }
}

public static void main(String[] args) {
    Scanner scnr = new Scanner(System.in);
    int[] newArray = new int[20];
    int newArraySize = 0;
    while (newArraySize < newArray.length && scnr.hasNextInt()) {
        newArray[newArraySize] = scnr.nextInt();
        newArraySize++;
    }
    for (int i = 0; i < newArraySize; i++) {
        System.out.println("The " + i + " input is " + newArray[i]);
    }
}

--> 1
--> 2
--> 10 11 12 13 14 15 16
--> 20
--> 21

Scanner scnr = new Scanner(System.in);
List<Integer> valuesList = new ArrayList<>();
System.out.println("Enter all the  Integer values you would like");
System.out.println("stored into your int[] array.  You can enter");
System.out.println("them either singular or multiple values on a");
System.out.println("single line spaced apart with a single white"); 
System.out.println("space. To stop numerical entry and view your");
System.out.println("array contents just enter nothing.");
System.out.println("============================================");
System.out.println();
String inputLine = "";
while (inputLine.isEmpty()) {
System.out.print("Enter a numerical value: --> ");
inputLine = scnr.nextLine().trim();
// If nothing is supplied then end the 'data entry' loop.
if (inputLine.isEmpty()) {
break;
}
//Is it a string line with multiple numerical values?
if (inputLine.contains(" ") && inputLine.replace(" ", "").matches("\\d+")) {
String[] values = inputLine.split("\\s+");
for (String vals : values) {
valuesList.add(Integer.valueOf(vals));
}
}
//Is it a string line with a single numerical value?
else if (inputLine.matches("\\d+")) {
valuesList.add(Integer.valueOf(inputLine));
}
// If entry is none of the above...
else {
System.err.println("Invalid numerical data supplied (" + inputLine + ")! Try again...");
}
inputLine = "";
}
System.out.println("============================================");
System.out.println();
// Convert List<Integer> to int[]...
int[] newArray = new int[valuesList.size()];
for (int i=0; i < valuesList.size(); i++) {
newArray[i] = valuesList.get(i);
}
// Display the int[] Array
for (int i = 0; i < newArray.length; i++) {
System.out.println("The " + i + " input is " + newArray[i]);
}

Scanner scnr = new Scanner(System.in);
int[]newArray = new int[20];
int newArraySize = 0;   
while (newArraySize < newArray.length){
try {
newArray[newArraySize] = scnr.nextInt();
newArraySize++;
}catch(Exception e){
scnr.nextLine();
}
}
for (int i = 0; i < newArraySize; i++){
System.out.println("The " + i + " input is " + newArray[i]);
} 

Scanner sc = new Scanner(System.in);
System.out.println("Input 20 numbers: ");
int[] arr = IntStream.generate(sc::nextInt) // create infinite stream generating values supplied by method `nextInt` of the scanner instance 
                     .limit(20)   // take only 20 values from stream
                     .toArray();  // put them into array
System.out.println(Arrays.toString(arr)); // print array contents at once

int[] arr = new int[20];
Arrays.setAll(arr, (x) -> sc.nextInt());

import java.util.Scanner;
public class AarrayScanner {
public static void main(String args[]) {
Scanner scnr = new Scanner(System.in);
int[] newArray = new int[20];
int newArraySize = 0;
while (scnr.hasNextInt() && newArraySize < newArray.length) {
newArray[newArraySize] = scnr.nextInt();
newArraySize++;
}
for (int i = 0; i < newArraySize; i++) {
System.out.println("The " + i + " input is " + newArray[i]);
}
}
}