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多项选择题 public class TestString3 {  public static void main(String[] args) {  // insert code here  System.out.println(s);  }  }  Which two code fragments, inserted independently at line 3, generate the output 4247?()

A、 String s = “123456789”; s = (s-”123”).replace(1,3,”24”) - “89”;

B、 StringBuffer s = new StringBuffer(”123456789”); s.delete(0,3).replace( 1,3, “24”).delete(4,6);

C、 StringBuffer s = new StringBuffer(”123456789”); s.substring(3,6).delete( 1 ,3).insert(1, “24”);

D、 StringBuilder s = new StringBuilder(”123456789”); s.substring(3,6).delete( 1 ,2).insert( 1, “24”);

E、 StringBuilder s = new StringBuilder(”123456789”); s.delete(0,3).delete( 1 ,3).delete(2,5).insert( 1, “24”);

  • B,E
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