在 for 循环中实例化数组以创建 JTextFields [英] Instantiating array in a for loop to create JTextFields

问题描述

我需要使用 forloop 和 text_fields 实例变量来实例化每个文本字段，使其成为侦听器，并将其添加到小程序.text_fields 变量是一个数组，数组的最大数量为 2.

I need to use a forloop and the text_fields instance variable to instantiate each text field, make it a listener, and add it to the applet. The text_fields variable is an array which has a max number of arrays of 2.

Container c = getContentPane();

c.setLayout(new FlowLayout());


 int i = 0;
 for (i = 0; i < FIELDS; i++)
 {
   THIS IS WHERE I DON'T KNOW WHAT TO WRITE.
       i need to instantiate the arrays, make them listeners and 
       add them to the applet.


 }

推荐答案

不清楚 FIELDS 是你的 JTextField 数组还是常量.如果是组件数组本身，在迭代时考虑使用.length数组字段.这减少了代码维护:

It's unclear is FIELDS is your JTextField aray or a constant. If it is the component array itself, consider using the .length array field when iterating. This reduces code maintenance:

JTextField[] fields = new JTextField[SIZE];
for (int i = 0; i < fields.length; i++) {
   fields[i] = new JTextField("Field " + i);
   fields[i].addActionListener(myActionListener);
   c.add(fields[i]);
}

注意大写变量用于 Java 命名约定下的常量.

Note uppercase variables are used for constants under Java naming conventions.

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