sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class异常解决方法
2017-02-09 13:30
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package com.wzs;
import java.lang.reflect.ParameterizedType;
public class T1<T> {
private Class classt;
public T1() {
ParameterizedType type = (ParameterizedType) this.getClass().getGenericSuperclass();
this.classt = (Class) type.getActualTypeArguments()[0];
System.out.println(this.classt);
}
}
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package com.wzs;
public class T2<T> extends T1<T> {
public static void main(String[] args) {
T2 t = new T2();
}
}
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Exception in thread "main" java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class
at com.wzs.T1.<init>(T1.java:10)
at com.wzs.T2.<init>(T2.java:3)
at com.wzs.T2.main(T2.java:5)
T1为父类,T2为子类,T2继承T1后报错类型转换异常,在网上查找N久资料才找到解决办法,出现问题原因还不是太明白(惭愧),不过知道怎么解决了。
下边贴出来修改后正常运行的代码,希望对大家有所帮助。
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package com.wzs;
import java.lang.reflect.ParameterizedType;
public class T1<T> {
private Class classt;
public T1() {
ParameterizedType type = (ParameterizedType) this.getClass().getGenericSuperclass();
this.classt = (Class) type.getActualTypeArguments()[0];
System.out.println(this.classt);
}
}
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package com.wzs;
public class T2 extends T1<Integer> {
public static void main(String[] args) {
T2 t = new T2();
}
}
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class java.lang.Integer
T1父类不用修改代码,T2中继承父类的时候指定父类的类型就可以了。
原文:http://blog.csdn.net/adam_wzs/article/details/25915203
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package com.wzs;
import java.lang.reflect.ParameterizedType;
public class T1<T> {
private Class classt;
public T1() {
ParameterizedType type = (ParameterizedType) this.getClass().getGenericSuperclass();
this.classt = (Class) type.getActualTypeArguments()[0];
System.out.println(this.classt);
}
}
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package com.wzs;
public class T2<T> extends T1<T> {
public static void main(String[] args) {
T2 t = new T2();
}
}
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Exception in thread "main" java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class
at com.wzs.T1.<init>(T1.java:10)
at com.wzs.T2.<init>(T2.java:3)
at com.wzs.T2.main(T2.java:5)
T1为父类,T2为子类,T2继承T1后报错类型转换异常,在网上查找N久资料才找到解决办法,出现问题原因还不是太明白(惭愧),不过知道怎么解决了。
下边贴出来修改后正常运行的代码,希望对大家有所帮助。
[java] view
plain copy
print?
package com.wzs;
import java.lang.reflect.ParameterizedType;
public class T1<T> {
private Class classt;
public T1() {
ParameterizedType type = (ParameterizedType) this.getClass().getGenericSuperclass();
this.classt = (Class) type.getActualTypeArguments()[0];
System.out.println(this.classt);
}
}
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package com.wzs;
public class T2 extends T1<Integer> {
public static void main(String[] args) {
T2 t = new T2();
}
}
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class java.lang.Integer
T1父类不用修改代码,T2中继承父类的时候指定父类的类型就可以了。
原文:http://blog.csdn.net/adam_wzs/article/details/25915203
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