Question

我有一个简单的JTree，系统地添加相关变量的节点：

public void init()
{   
    final String section1 = "JAVA";

    final String section1_content1 = "Tutorial1";
    final String section1_content2 = "Tutorial2";
    final String section1_content3 = "Tutorial3";
    final String section1_content4 = "Tutorial4";
    final String section1_content5 = "Tutorial5";
    final String section1_content6 = "Tutorial6";

    final String content1a = "Introduction";
    final String content1b = "Hello World!";

    // Create the title node:
    title = new DefaultMutableTreeNode(section1);

    // Create and attach the 1st subtree:
    selection = new DefaultMutableTreeNode(section1_content1);

    selection.insert(new DefaultMutableTreeNode(content1a),0);
    selection.insert(new DefaultMutableTreeNode(content1b),0);

    title.insert(selection,0);
}

我想要的是使用For-Loop，以避免额外的selection.inserts

类似

String[] sections = new String[]{ "Tutorial1", "Tutorial2", "Tutorial3", "Tutorial4", "Tutorial5", "Tutorial6" };

for (int i=0; i < sections.length; i++) { 
    selection = new DefaultMutableTreeNode( sections[i] );
}

我该怎么做？

谢谢

Answer 1

您可以将所有值放入枚举中，然后迭代它。

http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html

Answer 2

解决方案非常简单：

    for (int i=0; i<sections.length; i++) {
    selection = new DefaultMutableTreeNode(( sections[i]));
    title.insert(selection,0);
    }

sections [i]需要双括号

JTree - 如何使用For-Loop添加节点？

2 个答案: