38 lines
1.1 KiB
Java
38 lines
1.1 KiB
Java
// strings/UsingStringBuilder.java
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// (c)2017 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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import java.util.*;
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import java.util.stream.*;
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public class UsingStringBuilder {
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public static String string1() {
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Random rand = new Random(47);
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StringBuilder result = new StringBuilder("[");
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for(int i = 0; i < 25; i++) {
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result.append(rand.nextInt(100));
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result.append(", ");
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}
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result.delete(result.length()-2, result.length());
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result.append("]");
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return result.toString();
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}
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public static String string2() {
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String result = new Random(47)
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.ints(25, 0, 100)
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.mapToObj(Integer::toString)
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.collect(Collectors.joining(", "));
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return "[" + result + "]";
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}
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public static void main(String[] args) {
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System.out.println(string1());
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System.out.println(string2());
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}
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}
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/* Output:
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[58, 55, 93, 61, 61, 29, 68, 0, 22, 7, 88, 28, 51, 89, 9,
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78, 98, 61, 20, 58, 16, 40, 11, 22, 4]
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[58, 55, 93, 61, 61, 29, 68, 0, 22, 7, 88, 28, 51, 89, 9,
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78, 98, 61, 20, 58, 16, 40, 11, 22, 4]
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*/
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