[英]How can I set an enum attribute in my entity from a string read from a database (java)?
[英]how can i get set integer, string value from my Enum in Java?
如何在枚舉中預定義任何類型的值?
public enum Hardware
{
USB2(0) = "external low speed",
PCI(1) = "embedded",
USB3(2) = "external high speed
}
System.out.println( Hardware.USB2 ) // show me external low speed
您可以在enums
定義members
。 然后覆蓋toString()
您可以定義一個getDesc()
方法,該方法最好是IMO重寫toString()
。
public enum Hardware
{
USB2(0, "external low speed"),
PCI(1,"embedded"),
USB3(2,"external high speed");
private String desc;
private int id;
private Hardware(int id, String desc) {
this.id = id;
this.desc = desc;
}
@Override
public String toString() {
return this.desc;
}
}
請注意,此解決方案從Java
版本1.5
開始可用
enum Hardware
{
USB2("external low speed"),
PCI("embedded"),
USB3("external high speed");
private String val;
private Hardware(String val){
this.val = val;
}
public String toString(){
return val;
}
}
public enum Hardware {
USB2(0, "external low speed"),
PCI(1,"embedded"),
USB3(2,"external high speed);
String desc;
int id;
public Hardware(int id, String desc) {
this.id = id;
this.desc = desc;
}
public String toString() {
return this.desc;
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.