question: @ SuppressWarnings ( "unchecked" ) public void insert ( int id , Comparable < E > priority ) { int i ; i = ++ _n ; ElementH p = new ElementH ( ) ; while ( i > 1 ) { int pIdx = i / 2 ; ElementH eIdx = ( ElementH ) _elements [ pIdx ] ; p . id = eIdx . id ; p . priority = eIdx . priority ; if ( priority . compareTo ( ( E ) p . priority ) > 0 ) { break ; } ElementH ei = ( ElementH ) _elements [ i ] ; ei . id = p . id ; ei . priority = p . priority ; _pos [ p . id ] = i ; i = pIdx ; } ElementH ei = ( ElementH ) _elements [ i ] ; ei . id = id ; ei . priority = priority ; _pos [ id ] = i ; }
target:  Insert the element (id) with given priority. <p> Inserting too many items into a Binary Heap will cause exception.