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I have a Properties object and sometimes I need to add other Properties to it.
Properties myBasicProps = this.getClass.getResourceAsStream(MY_PROPS_PATH); ... Properties otherProps = new Properties(); otherProps.load(new StringReader(tempPropsString)); //tempPropsString contains my temporary properties myBasicProps.putAll(otherProps); I want to sort myBasicProps after this. I don't want to get all keys and values, sort them with Collections.sort() and then put it all to a new object. Is there a better way?
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Summary. Collections class sort() method is used to sort a list in Java. We can sort a list in natural ordering where the list elements must implement Comparable interface. We can also pass a Comparator implementation to define the sorting rules.
You can't, since a Set does not have random access methods (ie, . get() an element at a given index), which is basically required for sort algorithms ;) You can't since a HashSet doesn't have a defined order.
The sorting is a way to arrange elements of a list or array in a certain order. The order may be in ascending or descending order. The numerical and lexicographical (alphabetical) order is a widely used order.
No, java.util.Properties extends java.util.Hashtable which doesn't define a predictable sort order for keys or values.
You could try dumping all values into something like java.util.TreeMap, which will impose a natural ordering on your keys.
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