Java String import

Question

I have one doubt  When we use ArrayList or HashMap in Java  we have to import java util ArrayList or java util HashMap  But when we use String  it doesn t require the import statement  Can anyone clarify  why

User · Answer

String is present in package java lang which is imported by default in all java programs

User · Answer

Everything in the java lang package is implicitly imported  including String  and you do not need to do so yourself  This is simply a feature of the Java language  ArrayList and HashMap are however in the java util package  which is not implicitly imported   The package java lang mostly includes essential features  such a class version of primitives  basic exceptions and the Object class  This being integral to most programs  forcing people to import them is redundant and thus the contents of this package are implicitly imported

User · Answer

Java compiler imports 3 packages by default   1  The package without name 2  The java lang package That s why you can declare String  Integer  System classes without import  3  The current package  current file s package   That s why you don t need to declare import statement for the java lang package

User · Answer

import java lang String  This is an unnecessary import  java lang classes are always implicitly imported  This means that you do not have to import them manually  explicitly

[java] Java String import

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