Strings can change?

so i have this book and it says
"A String object is immutable its contents cannot be changed"

but Strings can change? at least in this code what does it mean by Strings cant be changed?

Code:

---

//String problem
public class string{

public static void main(String[] arg)
{

String Cheese = "THIS SHOULD NOT CHANGE STRINGS ARE IMMUTABLE";
System.out.println(Cheese);

Cheese = "Sally Mcsalad";
System.out.println(Cheese);

}
}

---

Strings are immutable in terms of memory.

this string changes because you told it to with the "="

Quote:

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Originally Posted by lymphocyte

so i have this book and it says
"A String object is immutable its contents cannot be changed"

but Strings can change? at least in this code what does it mean by Strings cant be changed?

Code:

---

//String problem
public class string{

public static void main(String[] arg)
{

String Cheese = "THIS SHOULD NOT CHANGE STRINGS ARE IMMUTABLE";
System.out.println(Cheese);

Cheese = "Sally Mcsalad";
System.out.println(Cheese);

}
}

---

---

You're making a common mistake: you're confusing the variable with the object. Please understand that Cheese is a String variable, and not the object itself. All you are doing in your code above is assigning different String objects to that variable. The String objects themselves are immutable or unchanging.

By the way, what type of lymphocyte are you? B? T?