View difference between Paste ID: KAaS4NUy and SbievNYj

 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.util.Scanner;
 
 public class SomeClass {
-    try (Scanner scanner = new Scanner(System.in)) {
+
-      System.out.println("enter a character and hit <enter> to know its Unicode code point");
+
 
-      int i = str.codePointAt(0);
+    Charset charset = Charset.defaultCharset();
-      System.out.print(str);
+    System.out.print("Used charset: ");
-      System.out.print(": ");
+    System.out.println(charset);
-      System.out.println(i);
+    if (!charset.contains(StandardCharsets.UTF_8))
       System.out.println("Warning: It does not contain all unicode characters!");
 
     try (Scanner scanner = new Scanner(System.in, charset)) {
       System.out.println("enter some characters and hit <enter> to know their Unicode code points");
       String str = scanner.nextLine();
       str.codePoints().forEach(cp -> {
         System.out.print(new String(Character.toChars(cp)));
         System.out.print(": ");
         System.out.println(cp);
       });
     }
   }
 }