Java Enum equals()用法及代碼示例

如果此枚舉對象與定義的對象相同，則 Enum 類的 equals() 方法返回 true。

用法

public final boolean equals(Object other)

覆蓋

Enum 類的 equals() 方法覆蓋了 Object 類的 equals() 方法。

參數

other- 它是要與此枚舉進行比較的對象。

返回值

如果定義的對象等於此枚舉，則 equals() 方法返回 true。

例子1

public class Enum_equalsMethodExample1 {
enum Colour{
red,reD;
    }
public static void main(String[] args) {
        Colour red,reD;
        red=Colour.red;
reD=Colour.reD;
if(red.equals(reD)){
System.out.println("Both are equal");
        }
else{
System.out.println("red and reD are not equal because of case sensitivity");
        }
    }
}

輸出：

red and reD are not equal because of case sensitivity

例子2

import java.util.Scanner;

public class Enum_equalsMethodExample2 {

enum SPS{

Stone,Paper,Scissor;
    }

public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

System.out.println("Choose amongst the following:");

for(SPS game:SPS.values()){

System.out.println(game);
        }

System.out.print("# ");String str = scanner.next();

        SPS Stone;

        SPS Paper;

        String Scissor;

        Scissor =SPS.Scissor.toString();

        Stone =SPS.Stone;

        Paper=SPS.Paper;

if(Paper.toString().equals(str)) {

System.out.println("There is a Tie");

        }
else if(str.equals(Stone.toString())){

System.out.println("Sorry ! You lose.");
        }
else if(str.equals(Scissor)){
System.out.println("Hurray! Yor won.");
        }
    }
}

輸出：

Choose amongst the following:
Stone
Paper
Scissor
#

例子3

public class Enum_equalsMethodExample3 {

enum movie{

Don,DDlJ,Fan,Zero;
   }

public static void main(String[] args) {

movie Don,DDLJ,Fan,Zero;

   Don=movie.Don;

System.out.println("Q In which movie Shah rukh khan has played a dual role ?");

        String obj="Don";

        Boolean b1 =obj.equals(Don.toString());

if(b1==true){

System.out.println("Ans. "+obj);

System.out.println("Your answer is correct.");
        }

else{

System.out.println("Sorry!You Failed.\n The Correct answer is Don.");
        }
    }
}

輸出：

Q In which movie Shah rukh khan has played a dual role ?
Ans. Don
Your answer is correct.

相關用法

注：本文由純淨天空篩選整理自 Java Enum equals() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。