Cat类(三个成员变量furcolor,height,weight)的equals方法如下public boolean equals(Object obj)实现过程:先判参数不为空,接着判是否同一类型,否的话,强转后比较三个成员变量均都相同才返回真,否则为假
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- CSDN专家-赖老师(软件之家) 2022-04-01 17:34关注
import java.util.Objects; public class Cat { String furcolor; float height; float weight; public Cat(){} public Cat(String furcolor,float height,float weight){ this.furcolor = furcolor; this.height = height; this.weight = weight; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Cat cat = (Cat) o; return Float.compare(cat.height, height) == 0 && Float.compare(cat.weight, weight) == 0 && Objects.equals(furcolor, cat.furcolor); } @Override public int hashCode() { return Objects.hash(furcolor, height, weight); } public String getFurcolor() { return furcolor; } public void setFurcolor(String furcolor) { this.furcolor = furcolor; } public float getHeight() { return height; } public void setHeight(float height) { this.height = height; } public float getWeight() { return weight; } public void setWeight(float weight) { this.weight = weight; } }
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