Java在利用反射条件下替换英文字母中的值

package cn.itcast.day01;import java.lang.reflect.Constructor;import java.lang.reflect.Field;public class ReflectTest { public static void main(String[] args) throws Exception { changeStringValue(pt1); System.out.println(pt1); }  private static void changeStringValue(Object obj) throws Exception{ Field[] fields = obj.getClass().getFields(); for(Field field :fields){  //if(field.getType().equals(String.class)){  if(field.getType() == String.class){ //同一个字节码用等号 而不是用equal  String oldValue = (String) field.get(obj);  String newValue = oldValue.replace('b','a');  field.set(obj, newValue);  } }  } }

package cn.itcast.day01;public class ReflectPoint { public String str1 = "ball"; public String str2 = "basketball"; public String str3 = "itcast"; public ReflectPoint(int x, int y) { super(); this.x = x; this.y = y; } public String toString(){ return str1+":"+str2+":"+str3; } public static void main(String[] args) { // TODO Auto-generated method stub }}