- [Java 9 中的字符串(String)压缩](https://www.ossez.com/t/java-9-string/14024)
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@ -9,17 +9,13 @@ public class CompactStringDemo {
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public static void main(String[] args) {
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long startTime = System.currentTimeMillis();
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List strings = IntStream.rangeClosed(1, 10_000_000)
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.mapToObj(Integer::toString).collect(toList());
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List strings = IntStream.rangeClosed(1, 10_000_000).mapToObj(Integer::toString).collect(toList());
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long totalTime = System.currentTimeMillis() - startTime;
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System.out.println("Generated " + strings.size() + " strings in "
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+ totalTime + " ms.");
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System.out.println("Generated " + strings.size() + " strings in " + totalTime + " ms.");
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startTime = System.currentTimeMillis();
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String appended = (String) strings.stream().limit(100_000)
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.reduce("", (left, right) -> left.toString() + right.toString());
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String appended = (String) strings.stream().limit(100_000).reduce("", (left, right) -> left.toString() + right.toString());
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totalTime = System.currentTimeMillis() - startTime;
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System.out.println("Created string of length " + appended.length()
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+ " in " + totalTime + " ms.");
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System.out.println("Created string of length " + appended.length() + " in " + totalTime + " ms.");
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}
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}
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