java中判断字符串数组是否包含特定字符串的三种方法实现与对比

import java.util.Arrays;

String[] array = {"a", "b", "c"};
boolean containsA = Arrays.asList(array).contains("a");
System.out.println(containsA); // 输出 true

String[] array = {"a", "b", "c"};
boolean found = false;

for (String str : array) {
    if ("a".equals(str)) {
        found = true;
        break;
    }
}
System.out.println(found); // 输出 true

import java.util.Arrays;

String[] array = {"a", "b", "c"};
boolean containsA = Arrays.stream(array)
    .anyMatch("a"::equals);
System.out.println(containsA); // 输出 true

import java.util.Arrays;

public class StringArrayCheck {
    public static void main(String[] args) {
        String[] array = {"apple", "banana", "a", "cherry"};
        
        // 方法1：Arrays.asList
        System.out.println("方法1: " + Arrays.asList(array).contains("a"));
        
        // 方法2：传统循环
        boolean found = false;
        for (String s : array) {
            if ("a".equals(s)) {  // 使用 "a".equals(s) 避免 NPE
                found = true;
                break;
            }
        }
        System.out.println("方法2: " + found);
        
        // 方法3：Stream API
        System.out.println("方法3: " + 
            Arrays.stream(array).anyMatch("a"::equals));
    }
}

// 忽略大小写比较
String[] array = {"A", "b", "c"};
boolean containsA = Arrays.stream(array)
    .anyMatch(s -> s != null && s.equalsIgnoreCase("a"));
System.out.println(containsA); // 输出 true