exercism————TwoFer_综合

题目：

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解法一：

public class TwoFer {
    String twoFerTest(String name) {
    return name == null ? "One for you,one for me" : "One for " + name + ",one for me";}
}

解法二：

import java.util.Optional;class Twofer {
    static String twofer(String name) {
    return String.format("One for %s, one for me.",Optional.ofNullable(name).orElse("you"));}
}

解法三：

public class Twofer {
    public String twofer(String name) {
    return String.format("One for %s, one for me.", name==null ? "you" : name);}
}