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UsingStringBuilder.java
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37 lines (36 loc) · 1.13 KB
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// strings/UsingStringBuilder.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.
import java.util.*;
import java.util.stream.*;
public class UsingStringBuilder {
public static String string1() {
Random rand = new Random(47);
StringBuilder result = new StringBuilder("[");
for(int i = 0; i < 25; i++) {
result.append(rand.nextInt(100));
result.append(", ");
}
result.delete(result.length()-2, result.length());
result.append("]");
return result.toString();
}
public static String string2() {
String result = new Random(47)
.ints(25, 0, 100)
.mapToObj(Integer::toString)
.collect(Collectors.joining(", "));
return "[" + result + "]";
}
public static void main(String[] args) {
System.out.println(string1());
System.out.println(string2());
}
}
/* Output:
[58, 55, 93, 61, 61, 29, 68, 0, 22, 7, 88, 28, 51, 89,
9, 78, 98, 61, 20, 58, 16, 40, 11, 22, 4]
[58, 55, 93, 61, 61, 29, 68, 0, 22, 7, 88, 28, 51, 89,
9, 78, 98, 61, 20, 58, 16, 40, 11, 22, 4]
*/