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javaËÄÉáÎåÈëBigDecimal

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package Test;
import java.math.BigDecimal; //ÒýÈëÕâ¸ö°ü
public class Test {
  public static void main(String[] args) {
   double i = 3.856;
   // ÉáµôСÊýÈ¡Õû
   System.out.println("ÉáµôСÊýÈ¡Õû:Math.floor(3.856)=" + (int) Math.floor(i));
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Inner classes in Java, the mystery within.

Inner classes, also called Nested Classes, are nothing but classes that are defined within other classes. The nesting is a relationship between classes, not objects.
Inner classes have clearly two benefits, name control & access control. In Java, this benefit is not as important because Java pa ......

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package graphic;
import javax.swing.ImageIcon;
import javax.swing.JTree;
import java.awt.Component;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultMutableTreeNode;
/**
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