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package p2;
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void helloworld(){
        System.out.println("HelloWorld");
    }
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Book.java
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package p1;
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    public static void main(String[] args) {
        Paper p = new Paper();   //line 5
        p.helloworld();
    }
}
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class User {
String name;
String age;

public User(String name,String age){
this.name=name;
this.age=age;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getName() {
return name;
}
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