package onlyfun.caterpillar;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
public class NewInstanceDemo2 {
public static void main(String[] args) {
try {
Class c = Class.forName(args[0]);
// 指定參數型態
Class[] params = new Class[2];
// 第一個參數是String
params[0] = String.class;
// 第二個參數是int
params[1] = Integer.TYPE;
// 取得對應參數列的建構方法
Constructor constructor =
c.getConstructor(params);
// 指定引數內容
Object[] argObjs = new Object[2];
argObjs[0] = "caterpillar";
argObjs[1] = new Integer(90);
// 給定引數並實例化
Object obj = constructor.newInstance(argObjs);
// 呼叫toString()來觀看描述
System.out.println(obj);
} catch (ClassNotFoundException e) {
System.out.println("找不到類別");
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
System.out.println("沒有所指定的方法");
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}