单例能被反射吗？肯定能。

单例能被反射吗？肯定能。

package com.zkk;

public class ElvisModified {
	private static boolean flag = false;
	public static boolean getFl(){
		return flag;
	}
	private ElvisModified() {
		synchronized (ElvisModified.class) {
			if (flag == false) {
				flag = !flag;
			} else {
				throw new RuntimeException("单例模式被侵犯！");
			}
		}
	}

	private static class SingletonHolder {
		private static final ElvisModified INSTANCE = new ElvisModified();
	}

	public static ElvisModified getInstance() {
		return SingletonHolder.INSTANCE;
	}

	public void doSomethingElse() {

	}
}

package com.zkk;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

public class Test3 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try {
			Class<ElvisModified> classType = ElvisModified.class;

			Constructor<ElvisModified> c = classType.getDeclaredConstructor(null);
			c.setAccessible(true);
		    Field[] fields= ElvisModified.class.getDeclaredFields();
		    for(Field field:fields){
		    	 if(Modifier.isStatic(field.getModifiers())){
		    		 System.out.println("字段是:"+field.getName());
		    		 field.setAccessible(true);
		    		 field.set(null,false);
		    	 }
		    		 
		    }
		   // System.out.println("当前static:"+ElvisModified.getFl());
		    	
			ElvisModified e1 = (ElvisModified) c.newInstance();
			 Field[] fields2= ElvisModified.class.getDeclaredFields();
			    for(Field field:fields2){
			    	 if(Modifier.isStatic(field.getModifiers())){
			    		 System.out.println("字段是:"+field.getName());
			    		 field.setAccessible(true);
			    		 field.set(null,false);
			    	 }
			    		 
			    }
			ElvisModified e2 = ElvisModified.getInstance();
			System.out.println(e1 == e2);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}