java - Compare one String with multiple values in one expression

Java - Compare one String with multiple values in one expression

In Java, you cannot directly compare one string with multiple values in one expression using the == operator. However, you can achieve this by using logical OR (||) operators or by using the equals() method. Here are two ways to compare one string with multiple values:

  1. Using Logical OR (||) operators:
String str = "apple";

if (str.equals("apple") || str.equals("banana") || str.equals("orange")) {
    // str is equal to "apple", "banana", or "orange"
}
  1. Using equals() method:
String str = "apple";
if ("apple".equals(str) || "banana".equals(str) || "orange".equals(str)) {
    // str is equal to "apple", "banana", or "orange"
}

Both methods achieve the same result. The first method directly calls the equals() method on each string value, while the second method calls the equals() method on the constant string values.

Choose the method that you find more readable and maintainable for your specific use case.

Examples

  1. "Java compare String with multiple values in one expression"

    • Description: This query seeks a way to compare a single String variable against multiple values simultaneously in Java.
    • Code:
      String input = "value";
if (input.equals("value1") || input.equals("value2") || input.equals("value3")) {
    // Perform actions if input matches any of the values
}

  2. "Java check if String matches any value in array"

    • Description: This query aims to determine if a String matches any value within a predefined array of values in Java.
    • Code:
      String input = "value";
String[] values = {"value1", "value2", "value3"};
if (Arrays.asList(values).contains(input)) {
    // Perform actions if input matches any of the values
}

  3. "Java compare String with multiple values using switch case"

    • Description: This query looks for a solution to compare a String against multiple values using a switch-case statement in Java.
    • Code:
      String input = "value";
switch (input) {
    case "value1":
    case "value2":
    case "value3":
        // Perform actions if input matches any of the values
        break;
    default:
        // Perform actions if input doesn't match any of the values
        break;
}

  4. "Java compare String with multiple values using if-else if"

    • Description: This query seeks a method to compare a String against multiple values using if-else if statements in Java.
    • Code:
      String input = "value";
if (input.equals("value1")) {
    // Perform actions if input matches value1
} else if (input.equals("value2")) {
    // Perform actions if input matches value2
} else if (input.equals("value3")) {
    // Perform actions if input matches value3
}

  5. "Java match String against multiple values using regex"

    • Description: This query explores using regular expressions (regex) to match a String against multiple values in Java.
    • Code:
      String input = "value";
if (input.matches("value1|value2|value3")) {
    // Perform actions if input matches any of the values
}

  6. "Java check if String is in a set of values"

    • Description: This query looks for a method to determine if a String is contained within a predefined set of values in Java.
    • Code:
      String input = "value";
Set<String> values = new HashSet<>(Arrays.asList("value1", "value2", "value3"));
if (values.contains(input)) {
    // Perform actions if input matches any of the values
}

  7. "Java compare String with multiple values using streams"

    • Description: This query seeks a solution to compare a String against multiple values using Java streams.
    • Code:
      String input = "value";
List<String> values = Arrays.asList("value1", "value2", "value3");
if (values.stream().anyMatch(input::equals)) {
    // Perform actions if input matches any of the values
}

  8. "Java compare String with multiple values using enum"

    • Description: This query explores using enums to compare a String against multiple values in Java.
    • Code:
      enum MyEnum { VALUE1, VALUE2, VALUE3 }

String input = "value";
if (EnumSet.allOf(MyEnum.class).stream().anyMatch(e -> e.name().equals(input))) {
    // Perform actions if input matches any of the enum values
}

  9. "Java compare String with multiple values using pattern matching"

    • Description: This query investigates using pattern matching to compare a String against multiple values in Java.
    • Code:
      String input = "value";
if (switch (input) {
        case "value1", "value2", "value3" -> true;
        default -> false;
    }) {
    // Perform actions if input matches any of the values
}

  10. "Java check if String matches any value using StringUtils"

    • Description: This query involves using Apache Commons Lang's StringUtils library to check if a String matches any value.
    • Code:
      String input = "value";
String[] values = {"value1", "value2", "value3"};
if (StringUtils.equalsAny(input, values)) {
    // Perform actions if input matches any of the values
}

More Tags

nsurlprotocol subreport mediarecorder urllib2 xls redis-py virtual-reality realloc upi graphql-java

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