[英]JTree - how to add nodes with a For-Loop?
我有一个简单的JTree
,可以系统地从相关var中添加节点:
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,以避免额外的选择。
就像是
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
您可以将所有值放入一个枚举,然后遍历该枚举。
http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html
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);
}
第[i]节需要使用双括号
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