class ThreadBoth extends Thread implements Runnable ｛ public void run（）｛ System.out.print（"hi "）； ｝ public static void main（String [] args）｛ Thread t1 ＝ new ThreadBoth（）； Thread t2 ＝ new Thread（t1）； t1.run（）； t2.run（）； ｝ ｝ 结果为：（） A、hiB、hi hiC、编译失败D、代码运行，但无输出结果
class ThreadBoth extends Thread implements Runnable ｛ public void run（）｛ System.out.print（"hi "）； ｝ public static void main（String [] args）｛ Thread t1 ＝ new ThreadBoth（）； Thread t2 ＝ new Thread（t1）； t1.run（）； t2.run（）； ｝ ｝ 结果为：（）
- A、hi
- B、hi hi
- C、编译失败
- D、代码运行，但无输出结果
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现有： class ThreadBoth extends Threaa implements Runnable { public void run（） （System.out.print（"hi"）； } public static voicl main （String [] args） { Thread tl=new ThreadBoth（）： Thread t2 = new Thread （tl）： tl.run（）： t2.run（）： } 结果为：（） A、 hi hiB、 hiC、编译失败D、运行时异常被抛出
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单选题现有： class ThreadBoth extends Threaa implements Runnable { public void run（） （System.out.print（"hi"）； } public static voicl main （String [] args） { Thread tl=new ThreadBoth（）： Thread t2 = new Thread （tl）： tl.run（）： t2.run（）： } 结果为：（）A hi hiB hiC编译失败D运行时异常被抛出