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public class IntegerCompare {
/**
* @param args
*/
public static void main(String[] args) {
Integer i1 = 100;
Integer i2 = 100;
if (i1 == i2) {
System.out.println("i1==i2");
} else {
System.out.println("i1!=i2");
}
Integer i3 = 200;
Integer i4 = 200;
if (i3 == i4) {
System.out.println("i3==i4");
} else {
System.out.println("i3!=i4");
}
Integer a = 100;
Integer b = 100;
System.out.println(a == b);
b = a;
System.out.println(a == b);
a++;
System.out.println(a == b);
}


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package algorithm.binarytree;
import java.util.Arrays;
import java.util.Stack;
import util.ArrayUtil;
import util.OutputUtil;
public class BinTree {
    private BinNode root = null;
    public BinTree()
    {
    }
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