The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.
See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.
java.lang.CharSequence
interface have to implement?public interface SomethingIsWrong { void aMethod(int aValue){ System.out.println("Hi Mom"); } }
public interface Marker { }
CharSequence
interface found in the java.lang
package. Your implementation should return the string backwards. Select one of the sentences from this book to use as the data. Write a small main
method to test your class; make sure to call all four methods.