Tag: allmatch java 8

allMatch, anyMatch and noneMatch methods introduced in Java 8 can be used with Lambda Expressions to find if any word or letter exists in a list of strings or not.

Kindly check the below code to see the behavior of the 3 methods.

import java.util.*;
import java.util.stream.*;

public class Java8MatchExample {
    public static void main(String args[]) {

      List<String> namesList = Java8MatchExample.getNamesList();
      boolean respMatch = namesList.stream().allMatch(n->n.contains("z"));
      
      if(respMatch==true){
          System.out.println("All words contain z");
      }
      else{
          System.out.println("Not all words contain z");
      }
      
      boolean respAnyMatch = namesList.stream().anyMatch(n->n.contains("z"));
      
      if(respAnyMatch==true){
          System.out.println("Atleast one word contains z");
      }
      else{
          System.out.println("None of the words contain z");
      }
      
      boolean respNoneMatch = namesList.stream().noneMatch(n->n.contains("y"));
      
      if(respNoneMatch==true){
          System.out.println("None of the words contains y");
      }
      else{
          System.out.println("One or more words contain y");
      }
      
    }
    
    private static List<String> getNamesList(){
        
        List<String> list = new ArrayList<String>();
        list.add("nathan");
        list.add("chris");
        list.add("david");
        list.add("james");
        list.add("mike");
        list.add("zack");
        
        return list;
    }
    
}