StringBuffer sb = new StringBuffer();
if (sb.length() == 0 || sb.toString().trim().equals("")) {
System.out.println("StringBuffer is empty.");
}
或
if (TextUtils.isEmpty(sb.toString())) {
System.out.println("StringBuffer is empty.");
}
Java determines whether StringBuffer is empty
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Origin blog.csdn.net/qq_27494201/article/details/135368297
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