O método toString() da classe Enum retorna o nome desta constante enum, conforme a declaração contém.
O método toString() pode ser substituído, embora não seja essencial.
Sintaxe
public String toString()
Parâmetros
QUE
Sobrepor:
O método toString() da classe Enum substitui o método toString() da classe Object.
Valor de retorno
O método toString() retorna o nome desta constante enum.
Exemplo 1
enum Planets{ Mercury, Venus, Earth, Mars, Jupiter,Uranus, Neptune; } public class Enum_toStringMethodExample1 { public static void main(String[] args) { System.out.println('Seven Planets :'); for(Planets planets: Planets.values()){ int i = planets.ordinal()+1; System.out.println(i+' '+planets.toString()); } } }Teste agora
Saída:
Seven Planets : 1 Mercury 2 Venus 3 Earth 4 Mars 5 Jupiter 6 Uranus 7 Neptune
Exemplo 2
import java.util.Scanner; public class Enum_toStringMethodExample2 { enum Position{ First ,Second,Third; } enum Prize{ Gold ,Silver,Bronze; } public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println('Enter your positon:'); String str =scanner.next(); for(Position pos : Position.values()){ int i = pos.ordinal(); //it will return the enum constant as String String str1 =pos.toString(); if(str.equals(str1)){ for(Prize prize: Prize.values()){ int j= prize.ordinal(); if(i==j){ System.out.println('Congratulation! You have won a '+prize+' medal.'); } } } } } }
Saída:
Enter your positon: Second Congratulation! You have won a Silver medal.
Exemplo 3
import java.util.Scanner; public class Enum_toStringMethodExample3 { enum Grade{ A ,B,C,D ,E; } public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println('Enter your grade'); String str = scanner.next(); String str1 =Grade.A.toString(); if(str.equals(str1)){ System.out.println('Excellent You scored above 90'); } else if(str.equals(Grade.B.toString())){ System.out.println('Very good You scored above 80 but below 90 '); } else if(str.equals(Grade.C.toString())){ System.out.println('Good You scored above 70'); } else if(str.equals(Grade.D.toString())){ System.out.println('Fair You scored aboved 50'); } else{ System.out.println('Word Hard You failed!'); } } }
Saída:
Enter your grade C Good You scored above 70