Iterator Applets in Java

 

 Import  Java. util. collection;  Import  Java. util. hashset;  Import  Java. util. iterator;  Public   Class  Testiterator {  Public   Static   Void  Main (string [] ARGs) {collection books = New Hashset (); books. Add ( "Java handouts" ); Books. Add ( "Java Ajax" ); Books. Add ( "Java authoritative guide" );  //  Get the iterator corresponding to the books set Iterator it = Books. iterator ();  While (It. hasnext ()){ //  The data type returned by it. hasnext () is object, so forced type conversion is required. String book = (String) it. Next (); system. Out. println (book ); If (Books. Equals ("Java handout" ) {It. Remove ();}  //  Copying a book does not change the book itself. Book = "test string" ;} System. Out. println (books );}}
 

 Import  Java. util. collection;  Import  Java. util. hashset;  Import  Java. util. iterator;  Public   Class Testiterator {  Public   Static   Void  Main (string [] ARGs) {collection books = New  Hashset (); books. Add ( "Java handouts" ); Books. Add ( "Java Ajax" ); Books. Add ( "Java authoritative guide" );  //  Get the iterator corresponding to the books set Iterator it = Books. iterator (); While (It. hasnext ()){ //  The data type returned by it. hasnext () is object, so forced type conversion is required. String book = (String) it. Next (); system. Out. println (book );  If (Book. Equals ("Java handout" )){  //  The Set elements cannot be modified during iterator iteration.CodeException thrown  Books. Remove (book );}}  // System. Out. println (books );  }} 

 

Java Ajax
Java Handouts
Java authoritative guide
[Java Ajax, Java handouts, Java authoritative guide]