OnJava8-Examples/references/ImmutableStrings.java

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// references/ImmutableStrings.java
// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Demonstrating StringBuilder
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public class ImmutableStrings {
public static void main(String[] args) {
String foo = "foo";
String s = "abc" + foo + "def"
+ Integer.toString(47);
System.out.println(s);
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// The "equivalent" using StringBuilder:
StringBuilder sb =
new StringBuilder("abc"); // Creates String
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sb.append(foo);
sb.append("def"); // Creates String
sb.append(Integer.toString(47));
System.out.println(sb);
}
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}
/* Output:
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abcfoodef47
abcfoodef47
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*/