1.

Method[] methods = Yuitest.class.getMethods();
for (Method method:methods){
    System.out.println( method.getName());
}
2.

Yuitest yuitest =new Yuitest();
Method[] methods = yuitest.getClass().getMethods();
for (Method method:methods){
   System.out.println( method.getName());
}
3.

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