Mar 14, 2014 · Yes, String object caches its hashcode at the time of object creation which makes it the great candidate for hashing related operations because hashcode doesn't need to be calculated again which save us some time. This is why String is mostly used as HashMap keys. Read More on Why String is Immutable and Final in Java.

Jan 10, 2012 · Java String is immutable, String will Store the value in the form of object. so if u assign the value String a="a"; it will create an object and the value is stored in that and again if you are assigning value a="ty" means it will create an another object store the value in that, if you want to understand clearly, check the has code for the String.

String class is immutable, and you can not change value of immutable object. But in case of String, if you change the value of string than it will create new string in string pool and than your string reference to that value not the older one. so by this way string is immutable. Lets take your example, String str = "Mississippi"; System.out ...

Jun 8, 2014 · Why can't strings be mutable in Java and .NET? Why .NET String is immutable? Several languages have chosen for this, such as C#, Java, and Python. If it is intended to save memory or gain efficiency for operations like compare, what effect does it have on concatenation and other modifying operations?

Sep 18, 2008 · And to address the same issue of these String literals being modified at runtime, Java simply makes the String class immutable (i. e, gives you no setters that would allow you to change the String content). Strings would not have to …

Jan 6, 2014 · In Java, if two string primitive variables are initialized to the same literal, it assigns the same reference to both variables: String Test1="Hello World"; String Test2="Hello World"; System.out.println(test1==test2); // true That is the reason the comparison returns true.

Jan 30, 2013 · Why Java String is immutable and why it is good: you can share a string between threads and be sure no one of them will change the string and confuse another thread; you don’t need a lock. Several threads can work with immutable string without conflicts; if you just received a string, you can be sure no one will change its value after that

Nov 11, 2008 · Why are string objects immutable in java? Because Java uses the concept of string literal. Suppose there are 5 reference variables, all refers to one object "Future".If one reference variable changes the value of the object, it will be affected to all the reference variables. That is why string objects are immutable in java.

Aug 5, 2014 · As per my knowledge, a mutable string can be changed, and an immutable string cannot be changed. Here I want to change the value of String like this, String str="Good"; str=str+" Morning"; and o...

Sep 22, 2010 · Strings and integers are often thought of as values. Therefore it's not surprising to find that String class and the Integer wrapper class (as well as the other wrapper classes) are immutable in Java. A color is usually thought of as a value, thus the immutable Color class. Counterexample. In contrast, a car is not usually thought of as a value ...