invoke Set Method on Java Bean - Java Reflection

Java examples for Reflection:Java Bean

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Description

invoke Set Method on Java Bean

Demo Code


//package com.java2s;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class Main {
    public static void main(String[] argv) throws Exception {
        Object o = "java2s.com";
        String fieldName = "java2s.com";
        Object value = "java2s.com";
        invokeSet(o, fieldName, value);/*from  ww  w .j  a  v  a  2 s.  co m*/
    }

    public static void invokeSet(Object o, String fieldName, Object value) {
        Method method = getSetMethod(o.getClass(), fieldName);
        try {
            method.invoke(o, new Object[] { value });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static Method getSetMethod(Class objectClass, String fieldName) {
        try {
            Class[] parameterTypes = new Class[1];
            Field field = objectClass.getDeclaredField(fieldName);
            parameterTypes[0] = field.getType();
            StringBuffer sb = new StringBuffer();
            sb.append("set");
            sb.append(fieldName.substring(0, 1).toUpperCase());
            sb.append(fieldName.substring(1));
            Method method = objectClass.getMethod(sb.toString(),
                    parameterTypes);
            return method;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

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