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(base) MAC:Tue Sep 08:11:28:listGames> jshell
|  Welcome to JShell -- Version 14.0.1
|  For an introduction type: /help intro

jshell> int[] x = new int[10];
x ==> int[10] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }

jshell> String[] names = new String[]{"Manny", "Moe", "Jack"}
names ==> String[3] { "Manny", "Moe", "Jack" }

jshell> for(int k = 0; k < x.length; k++){x[k] = k*k;}

jshell> x
x ==> int[10] { 0, 1, 4, 9, 16, 25, 36, 49, 64, 81 }

jshell> x[0:]
|  Error:
|  ']' expected
|  x[0:]
|     ^

jshell> Arrays.copyOfRange(x, 1)
|  Error:
|  no suitable method found for copyOfRange(int[],int)
|      method java.util.Arrays.<T>copyOfRange(T[],int,int) is not applicable
|        (cannot infer type-variable(s) T
|          (actual and formal argument lists differ in length))
|      method java.util.Arrays.<T,U>copyOfRange(U[],int,int,java.lang.Class<? extends T[]>) is not applicable
|        (cannot infer type-variable(s) T,U
|          (actual and formal argument lists differ in length))
|  Arrays.copyOfRange(x, 1)
|  ^----------------^

jshell> Arrays.copyOfRange(x, 1, 10)
$5 ==> int[9] { 1, 4, 9, 16, 25, 36, 49, 64, 81 }

jshell> Arrays.copyOfRange(x, 3,5)
$6 ==> int[2] { 9, 16 }

jshell> x
x ==> int[10] { 0, 1, 4, 9, 16, 25, 36, 49, 64, 81 }

jshell> int[] y = Arrays.copyOf(x, 20);
y ==> int[20] { 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }

jshell> ArrayList<Integer> al = al.addAll(y);
|  Error:
|  incompatible types: int[] cannot be converted to java.util.Collection<? extends java.lang.Integer>
|  ArrayList<Integer> al = al.addAll(y);
|                                    ^

jshell> ArrayList<Integer> al = al.addAll(y.asList());
|  Error:
|  cannot find symbol
|    symbol:   method asList()
|  ArrayList<Integer> al = al.addAll(y.asList());
|                                    ^------^

jshell> ArrayList<Integer> al = al.addAll(asList(y));
|  Error:
|  cannot find symbol
|    symbol:   method asList(int[])
|  ArrayList<Integer> al = al.addAll(asList(y));
|                                    ^----^

jshell> ArrayList<Integer> al = al.addAll(Arrays.asList(y));
|  Error:
|  incompatible types: inference variable T has incompatible bounds
|      lower bounds: java.lang.Integer,java.lang.Object
|      lower bounds: int[]
|  ArrayList<Integer> al = al.addAll(Arrays.asList(y));
|                          ^-------^

jshell> y
y ==> int[20] { 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }

jshell> ArrayList<String> al = new ArrayList<>();
al ==> []

jshell> s
|  Error:
|  cannot find symbol
|    symbol:   variable s
|  s
|  ^

jshell> al.addAll(names);
|  Error:
|  incompatible types: java.lang.String[] cannot be converted to java.util.Collection<? extends java.lang.String>
|  al.addAll(names);
|            ^---^

jshell> al.addAll(Arrays.asList(names));
$11 ==> true

jshell> al
al ==> [Manny, Moe, Jack]

jshell> #this only works for object types, not primitives
|  Error:
|  illegal character: '#'
|  #this only works for object types, not primitives
|  ^
|  Error:
|  ';' expected
|  #this only works for object types, not primitives
|                  ^

jshell>