import java.util.ArrayList;
import java.util.Collections;
public class Demo120 {
public static void main(String[] args) {
ArrayList<Integer> list=new ArrayList<Integer>();
list.add(2);
list.add(20);
list.add(29);
list.add(12);
Collections.sort(list);
System.out.println("集合的元素:"+list);
System.out.println("索引值:"+Collections.binarySearch(list,12));
System.out.println("最大值:"+Collections.max(list));
System.out.println("最小值:"+Collections.min(list));
Collections.reverse(list);
System.out.println("集合的元素:"+list);
Collections.swap(list, 0, 2);
System.out.println("集合的元素:"+list);
Collections.replaceAll(list, 2, 100);
System.out.println("集合的元素:"+list);
}
}
JAVA小练习120——collections的一些常用方法
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转载自blog.csdn.net/Eric_The_Red/article/details/91832669
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