java反射机制-通过非默认构造器创建对象
今天研究了下java反射机制，并利用反射机制，通过非默认构造器创建对象，代码如下：public class Toy {// Comment out the following default constructor// to see NoSuchMethodError from (*1*) public Toy() {} public Toy(int i) {} public Toy(String s) {System.out.println("Toy(String s)");}}public class ToyTest {public static void main(String[] args) {Class c = null;Constructor con = null;Toy toy = null;try {c = Class.forName("typeinfo.toys.Toy");try { //获取String类型构造器：con = c.getConstructor(String.class);System.out.println(con); //传入“” 作为初始化参数 toy = (Toy) con.newInstance("");System.out.println(toy);}catch (NoSuchMethodException e) {}catch (IllegalArgumentException e) {}catch (InstantiationException e) {}catch (IllegalAccessException e) {}catch (InvocationTargetException e) {}}catch (ClassNotFoundException e) {print("Can't find FancyToy");System.exit(1);}catch (SecurityException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}
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