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package cn.hutool.core.swing.clipboard;

import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.io.Serializable;

/**
 * 剪贴板字符串内容监听
 * 
 * @author looly
 * @since 4.5.7
 */
public abstract class StrClipboardListener implements ClipboardListener, Serializable {
	private static final long serialVersionUID = 1L;

	@Override
	public Transferable onChange(Clipboard clipboard, Transferable contents) {
		if (contents.isDataFlavorSupported(DataFlavor.stringFlavor)) {
			return onChange(clipboard, ClipboardUtil.getStr(contents));
		}
		return null;
	}

	/**
	 * 剪贴板变动触发的事件方法
* 在此事件中对剪贴板设置值无效,如若修改,需返回修改内容 * * @param clipboard 剪贴板对象 * @param contents 内容 * @return 如果对剪贴板内容做修改,则返回修改的内容,{@code null}表示保留原内容 */ public abstract Transferable onChange(Clipboard clipboard, String contents); }




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