Java arrays工具类

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import java.util.Arrays;

public class ArraysT {
	public static void main(String[] args) {
		int arrA[]= {11,22,33,44};
		int arrB[]= {52,22,99,66};
		//1.快速遍历
		System.out.println(Arrays.toString(arrA));
		//2.比较是否相同
		System.out.println(Arrays.equals(arrA, arrB));
		//3.复制指定数组
		int arrC[]=new int[5];
		arrC=Arrays.copyOf(arrA, 10);//重新开辟空间
		System.out.println(Arrays.toString(arrC));
		//4.填充
		Arrays.fill(arrC, 99);
		System.out.println(Arrays.toString(arrC));
		//5.排序
		Arrays.sort(arrB);
		System.out.println(Arrays.toString(arrB));
	
		Person [] pers=new Person[3];
		pers[0]=new Person("h",20,"nan");
		pers[1]=new Person("l",18,"nv");
		pers[2]=new Person("hl",20,"nan");
		Arrays.sort(pers);//出现类型转换异常，需要指定排序类型
		for(Person p:pers) {
			System.out.println(p);
		}	
	}
}		
						
		class Person implements Comparable<Person>{
			private String name;
			private int age;
			private String gender;
			public String getName() {
				return name;
			}
			public void setName(String name) {
				this.name = name;
			}
			public int getAge() {
				return age;
			}
			public void setAge(int age) {
				this.age = age;
			}
			public String getGender() {
				return gender;
			}
			public void setGender(String gender) {
				this.gender = gender;
			}
			
			public Person(String name, int age, String gender) {
				super();
				this.name = name;
				this.age = age;
				this.gender = gender;
			}
			public Person() {
				super();
			}
			@Override
			public String toString() {
				// TODO Auto-generated method stub
				return name+"\t"+age+"\t"+gender;
				
			}
			@Override
			public int compareTo(Person o) {
				return this.age-o.age;
			}
		}