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package debug;import java.io.*;import java.lang.Thread;class MyThread extends Thread{  public int x = 0;  public void run(){    System.out.println(++x);  }}class R implements Runnable{  private in ......

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the org.apache.log4j.PatternLayout java doc


A flexible layout configurable with pattern string.
The goal of this class is to format

a LoggingEvent

and return the results as a String. The results depend on the conversion
pattern
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The conversion pattern is closely related to the conversion pattern of the
printf function in C ......
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