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public class Test {   
    public static void main(String[] args) {   
        int i=0;   
        i=i++;   
        System.out.println(i);   
    }   
}  
public class Test {
public static void main(String[] args) {
int i=0;
i=i++;
System.out.println(i);
}
}
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Compiled from "Test.java"  
public class Test extends java.lang.Object{   
public Test();   
  Code:   
   0:   aload_0   
   1:   invokespecial   #8; //Method java/lang/Object."<init>":()V   
   4:   return  
  
public static void main(java.lang.String[]);   
  Code:   
   0:   iconst_0   
   1:   istore_1   
   2:   iload_1   
   3:   iinc    1, 1  
   6:   istore_1   
   7:   getstatic   #16; //Field java/lang/System.out:Ljava/io/PrintStream;   
   10:  iload_1   
   11:  invokevirtual


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public class Student {
private Integer id;
private String name;
private Integer age;
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public Integer getId() {
return id;
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public class Stack {
Object[] datas;
Integer n=0;
Integer N=1;
public Stack(){
datas=new Object[N];
}

public void push(Object data){ ......

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