如何使用可变长度参数为Java函数动态传递参数

Question

Some function in java using variable length parameter. like

String java.lang.String.format(String format, Object... args)

How can dynamically pass parameter to this function?

For example

String fillInString(String str, ArrayList<String> token){
    return String.format(str, token[0], token[1]....);   
}

Answer 1

String fillInString(String str, ArrayList<String> token){
    return String.format(str, token.toArray(new String[token.size()]));   
}

Answer 2

send the token value to the function as an array.

String fillInString(String str, String ... token){
    return String.format(str, token);
}

var args like this can accept seperate arguments or an array.