数组合并和复制

public class char1 
{ 
public static void main(String[] arg) 
{ 
char s1[]={'a','b','c'}; 
char s2[]={'c','b','a'}; 
char s3[]=new char[s1.length+s2.length]; 
System.arraycopy(s1,0,s3,0,s1.length); 
System.arraycopy(s2,0,s3,s1.length,s2.length); 
System.out.println(s3); 
} 
}

	    /**
	     * 从一个byte[]数组中截取一部分
	     * @param src
	     * @param begin
	     * @param count
	     * @return
	     */
	    public static byte[] subBytes(byte[] src, int begin, int count) {
	        byte[] bs = new byte[count];
	        for (int i=begin; i<begin+count; i++) bs[i-begin] = src[i];
	        return bs;
	    }