String str1 = "Hello";
String str2 = "World";
String result = str1 + str2;
System.out.println(result);
List<String> list = new ArrayList<>();
list.add("Java");
list.add("Python");
list.add("C++");
System.out.println(list.size());
File file = new File("path/to/file.txt");
if (file.exists()) {
System.out.println("File exists");
} else {
System.out.println("File not found");
}
