适配器模式.java

interface TargetInterface {
  TargetObject operate();
}

class LegacyObject {
  Object method();
}

class AdapterForLegacy implements TargetInterface {
  LegacyObject legacy;
  
  public AdapterForLegacy(LegacyObject _legacy) {
    legacy = _legacy;
  }
  
  @Override
  Object operate() {
    Object obj = legacy.method();
    TargetObject toObj = toObj(obj);
    return toObj;
  }
}