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public static PerformOperation isOdd(){
return (int a) -> a % 2 != 0;
}
public static PerformOperation isPrime(){
return (int a) -> java.math.BigInteger.valueOf(a).isProbablePrime(1);
}
public static PerformOperation isPalindrome(){
return (int a) -> Integer.toString(a).equals( new StringBuilder(Integer.toString(a)).reverse().toString() );
}
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Java Lambda Expressions
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public static PerformOperation isOdd(){ return (int a) -> a % 2 != 0; }