26 lines
708 B
Java
26 lines
708 B
Java
// references/ImmutableStrings.java
|
|
// (c)2017 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://OnJava8.com for more book information.
|
|
// Demonstrating StringBuilder
|
|
|
|
public class ImmutableStrings {
|
|
public static void main(String[] args) {
|
|
String foo = "foo";
|
|
String s = "abc" + foo + "def"
|
|
+ Integer.toString(47);
|
|
System.out.println(s);
|
|
// The "equivalent" using StringBuilder:
|
|
StringBuilder sb =
|
|
new StringBuilder("abc"); // Creates String
|
|
sb.append(foo);
|
|
sb.append("def"); // Creates String
|
|
sb.append(Integer.toString(47));
|
|
System.out.println(sb);
|
|
}
|
|
}
|
|
/* Output:
|
|
abcfoodef47
|
|
abcfoodef47
|
|
*/
|