Java Arrays.copyOf 功能示例代码

package setclass;
 
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
 
public class SetTest1 {
 
	public static void main(String[] args) {
		// TODO Auto-generated method stub
        
  	  
        String[] arr=new String[5];
        String[] strs1={"123","234","345","456","789"};
        //String[] strs2=new String[2];//Two ways to state a array
        
        String[] str2=Arrays.copyOf(strs1, 3);
        String[] str3=Arrays.copyOf(strs1, 8);
        System.out.println();
        for(String ele:str2){
        	System.out.print(ele+";");
        	
        }
        System.out.println();
        for(String ele:str3){
        	System.out.print(ele+";");
        }
 
        int[] in={1,2,3,4,5};
        int[] int1=Arrays.copyOf(in,3);
        int[] int2=Arrays.copyOf(in,8);
 
        System.out.println();
        for(int ele:int1){
        	System.out.print(ele+";");
        	
        }
        System.out.println();
        for(int ele:int2){
        	System.out.print(ele+";");
        	
        }
  	
  	  }
}