First question:
New Arraylist<integer>(); for (int i=1; I <=100; i++) { Arr1.add (i); } Arr1.remove (ten); System.out.println ("Display collection contents" + arr1);
Second question
List
New Arraylist<string>(); Arr2.add ("A"); Arr2.add ("a"); Arr2.add ("C"); Arr2.add ("C"); Arr2.add ("a"); System.out.println ("Show arr2 Collection contents:" + arr2);
Set
hashset<string> hs = new hashset<string>(); Hs.add ( "A" ); Hs.add ( "a" ); Hs.add ( "C" ); Hs.add ( "C" ); Hs.add ( "a" ); System.out.println ( "Displays the contents of the HS collection:" + HS);
New Treeset<string>(); Ts.add ("A"); Ts.add ("a"); Ts.add ("C"); Ts.add ("C"); Ts.add ("a"); System.out.println ("Show TS Collection contents" + TS);
Third question
Map<string, string> HM =NewHashmap<string,string>(); Hm.put ("001", "Sky pivot"); Hm.put ("002", "Tian Xuan"); Hm.put ("003", "Tianyi"); Hm.put ("004", "Sky right"); Hm.put ("005", "Alioth"); Hm.put ("006", "Kaiyang"); Hm.put ("007", "Yao Guang"); HashMap<String,String> emp =NewHashmap<string,string>(); Emp.putall (HM); Emp.remove ("005"); SYSTEM.OUT.PRINTLN (HM); for(String key:emp.keySet ()) {System.out.println (key+ " = " +Emp.get (key)); }
1.22 jobs