在循环中为字符串变量赋值的有效方法

Question

I am assigning a value to a String variable ( name ) in a while loop. I understand that the String data type is immutable and if I assign 1000 different values to the same String variable it will create a 1000 references in the String Constant pool. However, I am not able to think of any other efficient way of doing this... please advice...

while ((name = reader.readLine()) != null) {
    //Add each character in the name to the list
    for (char c : name.toCharArray()) {
        if (c != ' ') {  
            list.add(Character.toLowerCase(c));                     
        }
    }               
    namesCount++;         
}

Answer 1

You should be good with name = reader.readLine() and that's a good practice. However since you asked about string pool in java, here is a nice explanation on when to use direct string assignment vs new String(...) and how it affects your heap - http://www.thejavageek.com/2013/06/19/the-string-constant-pool/