【2021】牛客模考·大厂定制真题JAVA工程师

public class Short {
  public static void main(String args[]) {
    StringBuffer s = new StringBuffer("Hello")
    if ((s.length() > 5) && (s.append("there").equals("False")))
    System.out.println("value is " + s)
  }
}

class Sudo {
  private int pid
  public Sudo(int pid) { this.pid = pid }
  public void setPid(int pid) { this.pid = pid }
  public int getPid() { return pid }
}
public class Root {
  static Sudo chmod(Sudo sudo) {
    sudo = new Sudo(1)
    return sudo
  }
  public static void main(String[] args) {
    Sudo sudo = new Sudo(0)
    System.out.print(sudo.getPid())
    Sudo sudo2 = chmod(sudo)
    System.out.print(sudo.getPid())
    System.out.print(sudo2.getPid())
    sudo = chmod(sudo2)
    System.out.print(sudo.getPid())
    System.out.print(sudo2.getPid())
  }
}

public class Person {
  private String name, comment
  private int age
  public Person(String n, int a, String c) {
    name = n age = a comment = c
  }
  public boolean equals(Object o) {
    if (!(o instanceof Person)) return false
    Person p = (Person) o
    return age == p.age && name.equals(p.name)
  }
}

import java.io.*
public class Foo implements Serializable {
  public int x, y
  public Foo(int x, int y) { this.x = x this.y = y }
 
  private void writeObject(ObjectOutputStream s) throws IOException {
    s.writeInt(x) s.writeInt(y)
  }
 
  private void readObject(ObjectInputStream s)
    throws IOException, ClassNoFoundException {
    //在这里补充代码
  }
}

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