How to iterate through an object when it is not an array type

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My object LabOrder contains data that cannot locate with array index. What I want to do is print the non-null values in the object like name = John. How can I iterate through that non null values and print?

You could use reflection to iterate over the object's fields:

Field[] fields = obj1.getClass().getDeclaredFields();

for (Field field : fields) {
    field.setAccessible(true);
    String name = field.getName();
    Object value = field.get(obj1);
    if (value != null) {
        System.out.println(name + " = " + value);
    }
}

Iterating over objects and arrays: frequent errors, Iterating over objects and arrays: frequent errors. A quick reference to why your code isn't working, or some errors I frequently make with iteration when the coffee wears off. 3 === '3', false (type matters; integer is not a string). Because Object.values(meals) returns the object property values in an array, the whole task reduces to a compact for..of loop.mealName is assigned directly in the loop, so there is no need for the additional line like it was in the previous example.

You should use reflection. This will help you:

ClassABC abc = new ClassABC();
for (Field field : abc.getClass().getDeclaredFields()) {
    field.setAccessible(true);
    String name = field.getName();
    Object value = field.get(abc);
    System.out.printf("%s: %s%n", name, value);
}

Iterating over arrays and objects in JavaScript, Iterating over arrays and objects in JavaScript 2) === 0) { console.log("Found: "​+arr[i]); break loop; } } console.log("No even number found. Looping through the array. Once you’ve converted the object into an array with Object.keys, Object.values, or Object.entries, you can loop through it as if it was a normal array. // Looping through arrays created from Object.keys const keys = Object.keys(fruits) for (const key of keys) { console.log(key) } // Results: // apple // orange // pear

Try below:

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;

LabOrder order = new LabOrder();// Instantiation of the bean.
LabOrder order = Introspector.getBeanInfo(LabOrder.class);
  for (PropertyDescriptor propertyDesc : order.getPropertyDescriptors()) {
      String propertyName = propertyDesc.getName();
      Object value = propertyDesc.getReadMethod().invoke(order);
      System.out.println(propertyName);
      System.out.println(value);
  }

Iterators and Generators · TypeScript, Some built-in types like Array , Map , Set , String , Int32Array , Uint32Array for..​of loops over an iterable object, invoking the Symbol.iterator property on the  This, perhaps, isn't quite as helpful. It seems like what we want in this case is not iteration, but instead traversal. Traversing through a JSONObject is different from iterating through a JSONObject‘s key set. For this, we actually need to check the value type, too. Let imagine we do this in a separate method:

Object.entries(), The Object.entries() method returns an array of a given object's own enumerable [key, value] pairs, in the same order as that provided by a forin loop. returns an empty array for any primitive type, since primitives have no  In TypeScript, You can iterate over iterable objects (including array, map, set, string, arguments object and so on) using forof loop. To be an iterable, an object must implement the @@iterator method. Loop over Array. Example of using 'forof' to iterate over array elements.

forin, The loop will iterate over all enumerable properties of the object itself and Note​: forin should not be used to iterate over an Array where the  Then you can iterate this array of CustomerType objects, instead of incorrectly trying to iterate CustomersType object. Is it clear now? If you need a concrete example, please share your current code first, so we can fix it.

How to Iterate Easily Over Object Properties in JavaScript, This article is focused on how to improve the iteration over object properties: enumerableKeys array contains natureColors own properties keys: 'colorC' and '​colorD' . Probably it's not comfortable to use these pairs directly. use as key any object type (plain object uses as key a string primitive type). We use an object array to store different types of data in each element location. An object array can store reference types such as string and value types such as int.Int, uint. Tip: For each object element, the type information is retained and can be used later. It is not lost. Allocate: We allocate an object array on the managed heap

Comments
  • Do you want to iterate over all attributes? Can you edit the class?
  • Overwrite toString method of that object, if you have access to the code.
  • you can use reflexion for that, see stackoverflow.com/questions/20899045/…
  • Yes i want to iterate through all attributes. In that object one attribute called name will be there. So what i exactly want to do is pass that name in to decrypt method. Because it is in the encrypted format.