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  String str  = "[010101]+[010102]";
  String ss = "
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\\[010101]";  
  String ssss = "
\\\\"+"[010101]";   //  
  System.out.println(str.replaceFirst(ssss,"ss"));


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import java.io.*;
import java.lang.Thread;
class MyThread extends Thread{
public int x = 0;
public void run(){
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}
}
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