The empty quotes make the Scanner chunk out the line one char at a time. At this point, the Scanner still returns a String, although the String contains only one character. To complete the use case, ...

Java Scanner char input example. Interestingly, the Java Scanner char input is not supported through a defined method in the Scanner class. However, it is possible to have a Scanner input one char at ...

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Immutable Stack and Queue implementation in Java Programming Language. A Stack is a Last In First Out (LIFO) data structure. It supports two basic operations called push and pop. The push operation ...