JAVA泛型-擦除

package com.xt.thinks15_7;

import java.util.Arrays;

class EraseObject1<A> {

}

class EraseObject2<A, B> {

}

class EraseObject3<K, V> {

}

/**
 * 擦除测试
 * 
 * @author Administrator
 *
 */
public class ErasedTest {
    public static void main(String[] args) {
        EraseObject1<Integer> eo1 = new EraseObject1<Integer>();
        EraseObject2<Object, String> eo2 = new EraseObject2<Object, String>();
        EraseObject3<String, Integer> eo3 = new EraseObject3<String, Integer>();
        System.out.println(Arrays.toString(eo1.getClass().getTypeParameters()));
        System.out.println(Arrays.toString(eo2.getClass().getTypeParameters()));
        System.out.println(Arrays.toString(eo3.getClass().getTypeParameters()));
    }
}

运行结果：

[A]
[A, B]
[K, V]

从运行结果可以看出这里new的新对象中的泛型类型在打印的时候是无法知晓被擦除了的