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public String[] split(String regex)
Splits this string around matches of the given regular expression. 
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class MyEclipseGen {
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javaÖÐСÊý±£Áô¼°Ê±¼äµÄһЩ²Ù×÷

import java.text.DecimalFormat
double a = 2.3659874;
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DecimalFormat df = new DecimalFormat("0.000");
String num = df.format(a);
System.out.println(num);
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public class Father{
public void speak(){
System.out.println("Father");
}
}
public class Son extends Father{
public void speak(){
System.out.println("son");
}
}
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