在switch语句中显示变量

Question

switch (name){
    case "Rusia":
       String a="Tuan Rumah"
        break;
    case "Brazil":
        String a="Zona Concacaf"
        break;
}
zona.setText(a);

如何在android studio

中将变量“a”显示到zona文本字段中

Answer 1

您需要在switch语句之外定义a，然后将其设置在里面。例如：

String a = "";
switch (name){
    case "Rusia":
        a = "Tuan Rumah";
        break;
    case "Brazil":
        a = "Zona Concacaf";
        break;
    default:
        a = "Unknown";
}
zona.setText(a);

Answer 2

将其定义为开关块：

    String a = "default";
    switch (name){
        case "Rusia":
            a="Tuan Rumah"
            break;
        case "Brazil":
            a="Zona Concacaf"
            break;
    }
    zona.setText(a);

Answer 3

String a = "";
switch (name){
    case "Rusia":
        a = "Tuan Rumah";
        break;
    case "Brazil":
        a = "Zona Concacaf";
        break;
}
if(!TextUtils.isEmpty(a))
    zona.setText(a);

Answer 4

定义变量＆＃39; a＆＃39;在switch语句之外和之前：

String a ="":
Switch()