Java 判断list，map，set，数组中是否包含某一个字符串工具类

package com.thk.utils;

import org.springframework.stereotype.Component;

import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;

@Component
public class LsitUtils {
    
    public boolean ifcontainString(Collection list, String str) {
        boolean b = false;
        for (Object o : list) {
            if (o.equals(str)) {
                return b = true;
            }
        }
        return b;
    }

    
    public boolean ifcontainString(HashMap map, String str) {
        boolean b = false;
        for (Object o : map.keySet()) {
            if (map.get(o).equals(str)) {
                return true;
            }
        }
        return b;
    }

    
    public boolean ifcontainString(String[] strings, String str) {
        boolean b = false;
        for (String string : strings) {
            if (string.equals(str)) {
                return true;
            }
        }
        return b;
    }

    
    public boolean ifcontainString(HashSet