week05的多态与接口如何实现长尾词的优化？

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javapublic class Fruit { private String name;

public String toString() { return Fruit [ + name + ]; }

public int hashCode() { final int prime=31; int result=1; result=prime * result + (name==null ? 0 : name.hashCode()); return result; }}

gistfile1.txt

public class { private String name; public String toString(){ return "Fruit [name-" + name + "]" +"\n" +super.toString(); } public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((name == null) ? 0 : name.hashCode()); return result; } public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; Fruit other = (Fruit) obj; if (name == null) { if (other.name != null) return false; } else if (!name.equals(other.name)) return false; return true; }