本文介绍了将HashMap转换为DefaultListModel的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
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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