Class [] argsClass = new Class [2];
argsClass[0] = Integer.class;
argsClass[1] = String.class;
User user2 = (User) userClass.getConstructor(argsClass).newInstance(new Object[]{12, "awe"});
error message:
java.lang.NoSuchMethodException: com.bean.User. < init > (java.lang.Integer, java.lang.String)
at java.base/java.lang.Class.getConstructor0(Class.java:3322)
at java.base/java.lang.Class.getConstructor(Class.java:2108) I guess your first parameter should be int type, not Integer , so modify this code:
argsClass[0] = Integer.class;modify to:
argsClass[0] = int.class;put
argsClass[0] = Integer.class;to
argsClass[0] = Integer.TYPE;if the attribute type in your user class is Integer, you should use Integer.TYPE if Integer.class, is int.
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