#Java 10, (削除) 83 (削除ここまで) 72 bytes (keywords)

n->"do if for int new try var byte case char ".substring(0,n*5)

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Old 83 bytes answer:

n->java.util.Arrays.copyOf("do if for int new try var byte case char".split(" "),n)

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Explanation:

n-> // Method with integer parameter and String-array return-type
 java.util.Arrays.copyOf( // Create a copy of the given array:
 "do if for int new try var byte case char".split(" ") 
 // The keywords as String-array,
 ,n) // up to and including the given `n`'th array-item

List of available keywords for Java 8. Java 10 has the keyword var in addition to these.

#Java 8+, 30 bytes (operators)

n->"+-/*&|^~<>".substring(0,n)

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Java 10, (削除) 83 (削除ここまで) 72 bytes (keywords)

n->"do if for int new try var byte case char ".substring(0,n*5)

Try it online.

Old 83 bytes answer:

n->java.util.Arrays.copyOf("do if for int new try var byte case char".split(" "),n)

Try it online.

Explanation:

n-> // Method with integer parameter and String-array return-type
 java.util.Arrays.copyOf( // Create a copy of the given array:
 "do if for int new try var byte case char".split(" ") 
 // The keywords as String-array,
 ,n) // up to and including the given `n`'th array-item

List of available keywords for Java 8. Java 10 has the keyword var in addition to these.

Java 8+, 30 bytes (operators)

n->"+-/*&|^~<>".substring(0,n)

Try it online.

#Java 10, 83 bytes (keywords)

n->java.util.Arrays.copyOf("do if for int new try var byte case char".split(" "),n)

Explanation:

Try it online.

n-> // Method with integer parameter and String-array return-type
 java.util.Arrays.copyOf( // Create a copy of the given array:
 "do if for int new try var byte case char".split(" ") 
 // The keywords as String-array,
 ,n) // up to and including the given `n`'th array-item

List of available keywords for Java 8. Java 10 has the keyword var in addition to these.

#Java 8+, 30 bytes (operators)

n->"+-/*&|^~<>".substring(0,n)

Try it online.

#Java 10, (削除) 83 (削除ここまで) 72 bytes (keywords)

n->"do if for int new try var byte case char ".substring(0,n*5)

Try it online.

Old 83 bytes answer:

n->java.util.Arrays.copyOf("do if for int new try var byte case char".split(" "),n)

Try it online.

Explanation:

n-> // Method with integer parameter and String-array return-type
 java.util.Arrays.copyOf( // Create a copy of the given array:
 "do if for int new try var byte case char".split(" ") 
 // The keywords as String-array,
 ,n) // up to and including the given `n`'th array-item

List of available keywords for Java 8. Java 10 has the keyword var in addition to these.

#Java 8+, 30 bytes (operators)

n->"+-/*&|^~<>".substring(0,n)

Try it online.

#Java 10, 83 bytes

n->java.util.Arrays.copyOf("do if for int new try var byte case char".split(" "),n)

Explanation:

Try it online.

n-> // Method with integer parameter and String-array return-type
 java.util.Arrays.copyOf( // Create a copy of the given array:
 "do if for int new try var byte case char".split(" ") 
 // The keywords as String-array,
 ,n) // up to and including the given `n`'th array-item

List of available keywords for Java 8. Java 10 has the keyword var in addition to these.

#Java 10, 83 bytes (keywords)

n->java.util.Arrays.copyOf("do if for int new try var byte case char".split(" "),n)

Explanation:

Try it online.

n-> // Method with integer parameter and String-array return-type
 java.util.Arrays.copyOf( // Create a copy of the given array:
 "do if for int new try var byte case char".split(" ") 
 // The keywords as String-array,
 ,n) // up to and including the given `n`'th array-item

List of available keywords for Java 8. Java 10 has the keyword var in addition to these.

#Java 8+, 30 bytes (operators)

n->"+-/*&|^~<>".substring(0,n)

Try it online.