Java 定义常量的几种方式

1. 类常量

/**
* 类常量
*/
public class ConstParam {
public static final String STATUS_1 = "1";// 状态
public static final String STATUS_0 = "0";// 状态
}

2. 接口常量

/**
* 接口常量
*/
public interface ScheduleType {
static final Integer NORMAL = 0;
static final Integer UPLOAD_FILE = 1;
static final Integer SCHEDULE_STATUS = 2;
static final Integer SCHEDULE_ASK = 3;
}

3.枚举常量

/**
* 枚举常量
*/
public enum Test {
ONE(1),TWO(2),THREE(3);

private Integer code;

private Test(Integer code){
this.code = code;
}

public Integer getCode(){
return this.code;
}
}

4. 各常量的特性以及优缺点