我想問(wèn)問(wèn)測(cè)試Set的contains方法接收到返回值不對(duì)勁為啥？我利用idea自動(dòng)重寫了equals和hashcode方法
測(cè)試了幾遍返回值都是false
小志沖沖沖
2021-04-09
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2021-05-18
//????@Override //????public?int?hashCode()?{ //???????final?int?prime=31; //???????int?result=1; //???????result=prime*result+((name==null)?0:name.hashCode()); //????????return?result; //????} //????@Override //????public?boolean?equals(Object?obj)?{ //??????if?(this?==?obj)?{ //?????????return?true; //??????} //??????if?(obj?==?null) //?????????return?false; //??????if?(!(obj?instanceof?Course)) //?????????return?false; //??????Course?course?=?(Course)?obj; //??????if?(this.name?==?null)?{ //?????????if?(course.name?==?null) //????????????return?true; //??????else //????????????return?false; // //??}else{ //??????if?(this.name.equals(course.name)) //???????return?true; //???????else //??????????return?false; // //???} // ////} // //???} //}2021-05-18
自動(dòng)寫的不對(duì)，可能是選項(xiàng)不對(duì)。