generate random string in java

import java.util.Random;

public class Generator {
	public static String generateRandomPassword(int len) {
		String chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijk"
          +"lmnopqrstuvwxyz!@#$%&";
		Random rnd = new Random();
		StringBuilder sb = new StringBuilder(len);
		for (int i = 0; i < len; i++)
			sb.append(chars.charAt(rnd.nextInt(chars.length())));
		return sb.toString();
	}
}

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Nyna 85 points

                                    @Test
public void givenUsingJava8_whenGeneratingRandomAlphanumericString_thenCorrect() {
&nbsp;&nbsp;&nbsp;&nbsp;int leftLimit = 48; // numeral '0'
&nbsp;&nbsp;&nbsp;&nbsp;int rightLimit = 122; // letter 'z'
&nbsp;&nbsp;&nbsp;&nbsp;int targetStringLength = 10;
&nbsp;&nbsp;&nbsp;&nbsp;Random random = new Random();
&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;String generatedString = random.ints(leftLimit, rightLimit + 1)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.filter(i -&gt; (i &lt;= 57 || i &gt;= 65) &amp;&amp; (i &lt;= 90 || i &gt;= 97))
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.limit(targetStringLength)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.toString();
&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(generatedString);
}

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