如何使用按钮清除富文本框

Question

如何使用按钮清除富文本框？

tc.connect()

它可能非常简单，我无法想到如何做到这一点。

Answer 1

fis = new FileInputStream(file);
BufferedReader br = new BufferedReader(new InputStreamReader(fis));

System.out.println("Total file size to read (in bytes) : " + fis.available());

String content = new String();

while ((content = br.readLine()) != null) {
    singleAddress.add(content);
}

for(int i = 0; i<singleAddress.size(); i++)
{
    char[] chars = singleAddress.get(i).toCharArray();
    Arrays.sort(chars);
    int hash = 0;
    for(int j = 0; j<chars.length; j++)
    {
        hash = 2*hash + (int)chars[j];
    }
    numbers.put(singleAddress.get(i), hash);
    System.out.println(hash + "  " + i);
}