정복잉

package day18; import java.util.Set; import java.util.TreeSet; import java.*; public class Test11 { public static void main(String[] args) { TreeSet tsi = new TreeSet(); TreeSet tss = new TreeSet(); for(int i = 0 ; i 숫자] 반환 TreeSet tss = new TreeSet( ); tss.subSet("F","T"); = F부터 T까지의 객체를 가진것들 반환

package day18; import java.util.Arrays; import java.util.HashSet; import java.util.Set; public class Test06 { public static void main(String[] args) { Object[] obj = {"1", new Integer(1),"2","2","3","3","4","4"}; Set set = new HashSet(); for(Object i :obj) { set.add(i); } System.out.println(set); } } package day18; import java.util.HashSet; import java.util.Set; public class Test10 { public stat..

package day18; import java.util.ArrayDeque; import java.util.LinkedList; import java.util.PriorityQueue; import java.util.Queue; import java.util.Stack; public class Test01 { public static void main(String[] args) { Stack st = new Stack(); st.add(13); st.push(14); st.push(15); st.push(16); System.out.println("Stack의 맨위 객체에 저장된 것 : "+st.peek()); while(!st.empty()) { System.out.println(st.pop()); ..

package day16; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; public class Test2 { public static void main(String[] args) { List a = new ArrayList(); List b = new LinkedList(); System.out.println("ArrayList"); printTiming(a); System.out.println("============"); System.out.println("LinkedList"); printTiming(b); } private static void printTiming(Listlist) { double ..

package day18; import java.util.Arrays; import java.util.Iterator; import java.util.LinkedList; import java.util.List; public class Test03 { public static void main(String[] args) { List list = new LinkedList(); list.add(1); list.add(2); list.add(3); list.add(0); System.out.println("list.add = 객체추가"+list); list.set(1, 0); System.out.println("list.set = 객체추가 /덮어쓰기"+list); list.remove(0); System.o..

import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class Test02 { //List의 기본1 public static void main(String[] args) { List a = new ArrayList(); a.add(1); a.add(2); a.add(3); a.add(0, 7); System.out.println("a.add = 객체 추가, add는 인데스를 지정하고 추가시 하나씩 밀어남"+a); a.set(0, 0); System.out.println("a.set = 객체 추가, set은 덮어버린다. "+a); a.remove(0); Sy..