Diff b/w String s="hello" and String s=new String("hello");

[rahana]

hello friends,

i have a doubt,what is the difference between

String s="Hello" and
String s=new String("Hello")

please help me.


Thanking u
Rahana Parveen

[heat84]

Its the same.
Only one String object is shared by all string having same character sequence.

[JosAH]

Its the same.
Only one String object is shared by all string having same character sequence.

This is definitely not true. The String s= "hello" initialization statement creates
one single interned String while String s = new String("hello") creates two String
objects: one interned the other one on the heap.

kind regards,

Jos

[heat84]

This is definitely not true. The String s= "hello" initialization statement creates
one single interned String while String s = new String("hello") creates two String
objects: one interned the other one on the heap.

kind regards,

Jos

Whats contained in an objects is the same but the references are the different i.e if you invoke s1.equals(s2) it returns true but s1==s2 returns false . Thats what I mearnt when I said they are the same.

[JosAH]

Whats contained in an objects is the same but the references are the different i.e if you invoke s1.equals(s2) it returns true but s1==s2 returns false . Thats what I mearnt when I said they are the same.

I understand what you mean but 'same', 'equal', 'equivalent' and 'identical' have
very precise meanings. Be a bit sloppy with their meaning and it will rear its ugly
head one sad day.

kind regards,

Jos

[heat84]

This is definitely not true. The String s= "hello" initialization statement creates
one single interned String while String s = new String("hello") creates two String
objects: one interned the other one on the heap.

kind regards,

Jos

At compile time , String s="hello" and String s = new String("hello") are the same in the sense that the strings will be in the string pool.In this case only one String object is shared by all string having same character sequence. However , at runtime, an object is created in the program space .

[JosAH]

At compile time , String s="hello" and String s = new String("hello") are the same in the sense that the strings will be in the string pool.In this case only one String object is shared by all string having same character sequence. However , at runtime, an object is created in the program space .

There is no string pool at compile time; javac just puts the string literal "hello"
in the .class file when it generates code for it. String s= "hello" generates
different byte code from what String s= new String("hello") does; check it with javap.

The two code fragments are definitely different. If all you want to see is "hello",
yes, then they're identical.

kind regards,

Jos

[itsraghz]

Yes, JosAh is absolutely correct.

They both are very much different! His explanations are appropriate.

[heat84]

There is no string pool at compile time; javac just puts the string literal "hello"
in the .class file when it generates code for it. String s= "hello" generates
different byte code from what String s= new String("hello") does; check it with javap.

The two code fragments are definitely different. If all you want to see is "hello",
yes, then they're identical.

kind regards,

Jos

Thanks , I got some enlightening .