java数组操作

package com.basic;
import java.util.Arrays;
class Student{
	String name;
	String age;
	public Student(String name,String age){
		this.name=name;
		this.age=age;

	}
	public void operate(){
		System.out.println("I graduated!");
	}
	public String toString(){
		return name+":"+age;
	}

}
public class ArrayT {

	public void simpleT(){
		String []ss=new String[]{"aaa","bbb"};
		System.out.println(ss[0]);
		//String []sss=new String[3]{"aaa","bbb","ccc"};error
		String []s={"aa","bb"};
		String []sc=s;
		System.out.println(sc[1]);
		String []su=new String[2];
		System.out.println(su[1]);
	}
	public void arrays(){
		int []a={1,5,4,3,2,6};
		int []b=Arrays.copyOf(a,8);//8截取长度,超过用零填充
		System.out.println(b[7]);
		int []bb=Arrays.copyOfRange(a,3,5);//3截取长度
		System.out.println(bb[1]);//5
		int c[]=Arrays.copyOf(a, a.length);
		System.out.println(Arrays.equals(a, c));//true
		Arrays.sort(a);//对a升序排序
		for(int o:a)
		System.out.print(o+" ");

	}
	public void ObjectArray(){
		Student st[]=new Student[2];
		System.out.println(st[1]);
		//st[1].operate();空指针
		st[1]=new Student("zhaozhi","22");
		System.out.println(st[1]);
	}
	public static void main(String[] args) {
		ArrayT art=new ArrayT();
		art.simpleT();
		Student student=new Student("zhaozhi3758","22");
		System.out.println(student);
		art.ObjectArray();
		System.out.println("--------------");
		art.arrays();
		System.out.println();
		//数组合并
		int a[]={1,2,3};
		int b[]={4,5,6};
		int c[]=new int[a.length+b.length-1];
		System.arraycopy(a,0,c,0,a.length);
		System.arraycopy(b,0,c,a.length-1,b.length);
		 for(int d:c){
			 System.out.print(d+"--");
		 }

	}

}