How to Fill (initialize at once) an Array in Java?

// Java program to fill the element in an array
import java.util.*;
public class Geeks {
    public static void main(String args[]) throws Exception {
        
        int a[] = new int[10];
        
      	// Adding elements in the array
        for (int i = 0; i < a.length; i++) 
            a[i] = i + 1;
        
        
        for (int i = 0; i < a.length; i++) 
            System.out.print(a[i] + " ");
   }
}

import java.util.*;
public class Geeks{
    public static void main(String args[]) throws Exception {
        
        // Array Declaration with elements
        int a[] = { 1, 2, 3, 4, 5 };
        
        for (int i = 0; i < array.length; i++)
            System.out.print(array[i] + " ");
   }
}

import java.util.*;
public class Geeks {
    public static void main(String args[]) throws Exception {
        
        int a[] = new int[10];
        
        // Filling the data
        Arrays.fill(a, 10);
        
        System.out.println(Arrays.toString(a));
   }
}

import java.util.Arrays;
public class Geeks {
    public static void main(String args[]){
      
        int[] a = new int[] { 1, 2, 3 };
        // copying array org to copy
        // Here, new array has 5 elements - two
        // elements more than the original array
        int[] arr2 = Arrays.copyOf(a, 5);
        for (int i = 0; i < arr2.length; i++)
            System.out.print(arr2[i] + " ");
    }
}

// Java program to illustrate setAll to set value
import java.util.Arrays;
public class Gfg {
    public static void main(String args[]){
      
        int[] array = new int[10];
        // Setting the value in the array
        Arrays.setAll(array, p -> p > 9 ? 0 : p);
      	System.out.println(Arrays.toString(array));
    }
}

// Java code to illustrate clone() method
import java.io.*;
import java.util.ArrayList;
public class Geeks {
    public static void main(String args[]){
        ArrayList<String> list = new ArrayList<String>();
        list.add("Geeks");
        list.add("for");
        list.add("Geeks");
        list.add("10");
        list.add("20");
        // Creating another linked list and copying
        ArrayList sec_list = new ArrayList();
        sec_list = (ArrayList)list.clone();
        System.out.println(sec_list);
    }
}