Monster.java

Class Monster {

    private static final String EMERGENCY_LIFE_LIMIT = 20;

    private String name = "";
    private Integer life = 0;

    public Monster(String name){
      this.name = name;
      this.life = 100;
    }

    public boolean isEmergencyLife(){
        return this.life < EMERGENCY_LIFE_LIMIT;
    }

}