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50 lines
905 B
50 lines
905 B
public class Jb38_ObjClass
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{
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public static void main(String[] args)
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{
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Dog d1 = new Dog("daHei");
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Dog d2 = new Dog("daHei");
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Dog d3 = d1;
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Demo d = new Demo();
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System.out.println(d1==d2);
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System.out.println(d1.equals(d2));
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//System.out.println(d1.equals(d));
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System.out.println(d1);
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System.out.println(d1.hashCode());
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Class c1 = d1.getClass();
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Class c2 = d2.getClass();
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System.out.println(c1==c2);
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System.out.println(d1.getClass().getName());
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}
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}
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class Dog extends Object
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{
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private String name;
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Dog(String name)
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{
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this.name = name;
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}
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/*
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一般都会覆盖此方法，根据对象的特有内容，建立判断对象是否有相同的依据
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*/
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public boolean equals(Object obj)
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{
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if (!(obj instanceof Dog))
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{
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throw new ClassCastException("类型与定义不同，错误");
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}
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Dog d = (Dog)obj;
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return this.name == d.name;
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}
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public String toString()
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{
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return "Dog:"+name;
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}
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}
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class Demo
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{
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} |