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);
    }