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public class Test {
public static void stringUpd(String str) {
str = str.replace("j", "l");
System.out.println(str);
}

public static void stringBufferUpd(StringBuffer bf) {
bf.append("c");
System.out.println(bf);
}

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package com.qiao.java;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.HashMap;
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