我得到的字符串錯誤

Question

從此改變了我的字符串後：

String osver = System.getProperty("os.name"); 
    if (osver.contains("Mac")){ 
    String app = wd + "/relap5.x\""; 
    } else if (osver.contains("Windows")){ 
    String app = "relap5.exe"; 
    } else if (osver.contains("linux")) { 
    String app = "/relap5.x"; 
    } 

要這樣：

String[] osver = {System.getProperty("os.name")}; 
    if (osver.contains("Mac")){ 
    String[] app = {wd + "/relap5.x\""}; 
    } else if (osver.contains("Windows")){ 
    String[] app = {"relap5.exe"}; 
    } else if (osver.contains("linux")) { 
    String[] app = {"/relap5.x"}; 
    } 

我得到的錯誤。

Cannot find symbol 
symbol: method contains(String) 
Location variable osver of type string[] 

Answer 1

這是因爲Array不包含方法contains。你的意思是以下幾點：

String osver = System.getProperty("os.name"); 
    String app; 
    if (osver.equals("Mac")){ 
     app = "wd" + "/relap5.x\""; 
    } else if (osver.equals("Windows")){ 
     app = "relap5.exe"; 
    } else if (osver.equals("linux")) { 
     app = "/relap5.x"; 
    } 
    System.out.println(app); 

上面的代碼將檢查平等，但如果你要檢查遏制然後使用：

 String osver = System.getProperty("os.name"); 
     String app; 
     if (osver.contains("Mac")){ 
      app = "wd" + "/relap5.x\""; 
     } else if (osver.contains("Windows")){ 
      app = "relap5.exe"; 
     } else if (osver.contains("linux")) { 
      app = "/relap5.x"; 
     } 
     System.out.println(app); 

Answer 2

你不能這樣做包含了超過一個數組。 你可以交替做：

List<String> osver = Arrays.asList(System.getProperty("os.name")); 

    if (osver.contains("Mac")) { 
     String[] app = { wd + "/relap5.x\"" }; 
    } else if (osver.contains("Windows")) { 
     String[] app = { "relap5.exe" }; 
    } else if (osver.contains("linux")) { 
     String[] app = { "/relap5.x" }; 
    }