Get type of generic type inside a List in Java

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天命终不由人
天命终不由人 2021-02-15 23:01

I have the below function:


    public  void putList(String key, List lst){
          if (T instanceof String) {
          // Do something              


        
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  •  北海茫月
    2021-02-15 23:37

    Type genericType = lst.getType();
    
    if(genericType instanceof ParameterizedType){
        ParameterizedType aType = (ParameterizedType) genericType;
        Type[] fieldArgTypes = aType.getActualTypeArguments();
        for(Type fieldArgType : fieldArgTypes){
            Class fieldArgClass = (Class) fieldArgType;
            System.out.println("fieldArgClass = " + fieldArgClass);
        }
    }
    

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