将HashMap转换为DefaultListModel [英] HashMap into DefaultListModel

问题描述

这是我的代码：

HashMap<String, String> inst1 = new HashMap(instructorIO.getInstructors());
instListModel = new DefaultListModel<String>(inst1.values());

我收到错误：

DepartmentProject.java:69: error: constructor DefaultListModel in class DefaultListModel<E> cannot be applied to given types;
    required: no arguments
    found: Collection<String>
    reason: actual and formal argument lists differ in length
    where E is a type-variable:
    E extends Object declared in class DefaultListModel

任何人都可以帮我吗？

推荐答案

DefaultListModel 只有一个不带参数的构造函数;你不能传递你想要的值作为构造函数arg。
您必须创建DefaultListModel然后再填充它，例如：

DefaultListModel only has a constructor that takes no arguments; you can't pass the values you want as a constructor arg. You will have to create the DefaultListModel and then populate it afterward, for example:

HashMap<String, String> inst1 = new HashMap(instructorIO.getInstructors());
instListModel = new DefaultListModel<String>();
for (String value : inst1.values())
{
    instListModel.addElement(value);
}

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