allMatch in Java ?

• allMatch() is used to verify each value in list should match with provided input/predicate.
• Returns boolean value (true/false)
• We can also use string in built functions (like toLowerCase(), StartWith,endsWith() etc.,.) to verify each value in given list. 

allMatch Java8 program:

import java.util.*;

public class allMatch {
   public static void main(String args[]) {
      List<String> keywords = Arrays.asList("email", "Email", "EMAIL desk", "ABCDE");
      boolean result1 = keywords.stream().allMatch(r -> r.toLowerCase().contains("email"));
      System.out.println("result1=" + result1);

      List<String> terms = Arrays.asList("email", "Email", "EMAIL desk", "eMaIl");
      boolean result2 = terms.stream().allMatch(r -> r.toLowerCase().contains("email"));
      System.out.println("result2=" + result2);

      List<String> words = Arrays.asList("email", "Email");
      boolean result3 = words.stream().allMatch(r -> r.contains("email"));
      System.out.println("result3=" + result3);

      List<String> keys = Arrays.asList("email", "email");
      boolean result4 = keys.stream().allMatch(r -> r.contains("email"));
      System.out.println("result4=" + result4);

      List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6);
      boolean result5 = numbers.stream().allMatch(r -> (r > 0 && r < 7));
      System.out.println("result5=" + result5);

      List<Integer> number = Arrays.asList(1, 2, 3, 10);
      boolean result6 = number.stream().allMatch(r -> (r > 20));
      System.out.println("result6=" + result6);

      List<String> fun = Arrays.asList("email", "email one");
      boolean result7 = fun.stream().allMatch(r -> r.startsWith("ema") && r.endsWith("il"));
      System.out.println("result7=" + result7);

      List<String> funs = Arrays.asList("email message", "email one message");
      boolean result8 = funs.stream().allMatch(r -> r.startsWith("ema") && r.endsWith("age"));
      System.out.println("result8=" + result8);
   }
}

Output:

allMatch() in Java

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