Java泛型：语法说明

在

<E>

public class GenericMethodTest{   // generic method printArray      public static < E > void printArray( E[] inputArray )   {      // Display array elements for ( E element : inputArray ){         System.out.printf( "%s ", element );         }         System.out.println();    }    public static void main( String args[] )    {        // Create arrays of Integer, Double and Character        Integer[] intArray = { 1, 2, 3, 4, 5 };        Double[] doubleArray = { 1.1, 2.2, 3.3, 4.4 };        Character[] charArray = { 'H', 'E', 'L', 'L', 'O' };        System.out.println( "Array integerArray contains:" );        GenericMethodTest.<Integer>printArray( intArray  ); // pass an Integer array        System.out.println( "nArray doubleArray contains:" );        GenericMethodTest.<Double>printArray( doubleArray ); // pass a Double array        System.out.println( "nArray characterArray contains:" );        GenericMethodTest.<Character>printArray( charArray ); // pass a Character array    } }

所以

<E>

E

E

Integer

Integer[]

但是，它 不会 更改返回类型。就像

public static