Difference between String and StringBuffer in java

Let’s see the difference between String and StringBuffer in java.

String is a immutable class which implements comparable interface.StringBuffer is a mutable class which does't implements Comparable interface.
We can create object of String in two ways without new operator and with new operator.We can create StringBuffer object only with new operator.
String uses String constant pool mechanism in order to reuse the objects.There is no concept in case of StringBuffer.
String methods are not synchronized.All StringBuffer methods are synchronized.
We can compare two string using compareT0() method We can't compare two StringBuffer object using compareTo() method.
String Overrides hashCode() and equals() methods. StringBuffer doesn't overrides hasCode() and equals() methods.