怎样在JAVA寫一個含未知類的參數的方法

Question

private String getMainTitle(List<String> bs){
    for(String b:bs){
        if (b.equals("GOOD"){
            return "string";
        }
    }
    
    return null;
}

private String getMainTitle(String b){
    if (b.equals("GOOD"){
        return "string";
    }
    
    return null;
}

public String getTitleFromString(String b){
    return getMainTitle(b);
}

public String getTitleFromList(List<String> bs){    
    return getMainTitle(bs);
}

請問怎样在JAVA寫一個含未知類的參數的方法?

希望寫一個方法能替代getTitleFromString和getTitleFromList , 比如:

public String getTitleFromList(T<?> t){    
    return getMainTitle(t);
}

但我的語法有誤, 請問該怎样改寫?

Answer 1

private String getMainTitle(List<String> bs){ for(String b:bs){ if (b.equals("GOOD")) { return "string"; } } return null; } private String getMainTitle(String b){ if (b.equals("GOOD")) { return "string"; } return null; } public String getTitleFrom(String b){ return getMainTitle(b); } public String getTitleFrom(List<String> bs){ return getMainTitle(bs); }