package com;
 
public enum Color {
   
   RED, GREEN, BLANK, YELLOW 
 
}

package com;
 
public class B {
 
  public static void main(String[] args) {
 
 
    System.out.println( isRed( Color.BLANK ) ) ; //结果： false
    System.out.println( isRed( Color.RED ) ) ;  //结果： true
 
  }
 
 
  static boolean isRed( Color color ){
    if ( Color.RED.equals( color )) {
      return true ;
    }
    return false ;
  }
 
}

package com;
 
public class B {
 
  public static void main(String[] args) {
 
    showColor( Color.RED );
 
  }
 
  static void showColor(Color color){
    switch ( color ) {
    case BLANK:
      System.out.println( color );
      break;
    case RED :
      System.out.println( color );
      break;
    default:
      System.out.println( color );
      break;
    }
     
  }
}

package com;
 
public enum Color {
   
   RED("红色", 1), GREEN("绿色", 2), BLANK("白色", 3), YELLO("黄色", 4);
   
   
  private String name ;
  private int index ;
   
  private Color( String name , int index ){
    this.name = name ;
    this.index = index ;
  }
   
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public int getIndex() {
    return index;
  }
  public void setIndex(int index) {
    this.index = index;
  }
   
 
}

package com;
 
public class B {
 
  public static void main(String[] args) {
 
    //输出某一枚举的值
    System.out.println( Color.RED.getName() );
    System.out.println( Color.RED.getIndex() );
 
    //遍历所有的枚举
    for( Color color : Color.values()){
      System.out.println( color + " name: " + color.getName() + " index: " + color.getIndex() );
    }
  }
 
}