Android的 - 如何檢查另一個逗號分隔的字符串中的字符串值的存在

Question

Android - 如何檢查另一個逗號分隔的字符串中的字符串值的存在。

String all_vals = "617,618,456,1,234,5,5678,225"; 
String check_val= "456"; 

如何檢查一樣，

if (all_vals contains check_val) { 

} 

Answer 1

轉換的逗號分隔字符串數組與split，然後將其轉換爲List與Arrays.asList，然後使用contains。

String all_vals = "617,618,456,1,234,5,5678,225"; 
List<String> list = Arrays.asList(all_vals.split(",")); 
if (list.contains(check_val)) { 

} 

這將防止誤報從剛剛檢查，如果在列表中存在的子帶contains直接在字符串all_vals，例如all_vals.contains("4")將在String#contains的情況下返回true。

Answer 2

String all_vals = "617,618,456,1,234,5,5678,225"; 
    String check_val= "5678"; 
    int place = 1; 

    String[] strings = all_vals.split(","); 
    for (String str : strings) { 
     if(str.equals(check_val)) 
     { 
      System.out.println("We have string in all_val on place: " + place); 
     } 
     place++; 
    } 

Answer 3

String all_vals = "617,618,456,1,234,5,5678,225"; 
String check_val= "456"; 

if (all_vals.startsWith(check_val) || 
    all_vals.endsWith(check_val) || 
    all_vals.contains("," + check_val + ",")) 
{ 
    System.out.println("value found in string"); 
}