Question

What will the following write?

String str = "Hello World!" ;
str.substring(6);
System.out.println( str );

Answer 1

The System.out.println(str) in the provided Java code will print the original string "Hello World!". The str.substring(6) has no effect as the result is not assigned to any variable.

Step-by-step explanation:

The student has asked what will be printed by the following Java code snippet:

String str = "Hello World!"; str.substring(6); System.out.println(str);

The substring method in Java is used to extract a portion of a string. In the code provided, str.substring(6) is called, which would return a new string starting from index 6 of the string str.

However, it is important to note that the substring method does not modify the original string; instead, it returns a new string. Since the new string is not assigned to any variable, the original string remains unchanged. Therefore, when System.out.println(str) is executed, it prints the original string "Hello World!".