如何合并2个已知的数组!

[itfly]

有两个数组：a[]={1,2,3,4};b[]={5,6,7,8}
现在想把他们合并为：c[]={1,2,3,4,5,6,7,8}
有什么方法比较简单高效率!

[rcom10002]

System.arraycopy()

[zlhran]

arraycopy()

[Hmilyl]

System.arraycopy()

[yanransoft]

System.arraycopy()

[xiayunfei148]

System.arraycopy(Object src, int srcPos, Object dest, int destPos, int length)

[做鸡真好吃]

Mark~

[lingkeylbh]

就是这样我以为楼主的意思是两个排好序的数组,组合排好序,不知道是不是多此一举了
public class arrayCombine {

/**
* @param args
*/
public static void main(String[] args) {
int a[] = {1,2,3,4};
int b[] = {5,6,7,8};
int c[] = combine(a,b);


}
public static int[] combine(int[] a, int[] b)
{
int alen = a.length;
int blen = b.length;
int clen = alen+blen;

int i,j;
int[] c = new int[clen];
for(i=0,j=0;i<alen&&j<blen;)
{
if(a[i]<b[j])
{
c[i+j]=a[i];
i++;
}
else
{
c[i+j]=b[j];
j++;
}


}

if(i==alen) System.arraycopy(b,j,c,alen+j,blen-j);

if(j==blen) System.arraycopy(a,i,c,blen+i,alen-i);
for(int k=0;k<a.length+b.length;k++)
System.out.println(c[k]);
return c;

}

}

[hanjienihao1]

lingkeylbh(凌可) 一箭双雕好!

[hanjienihao1]

class ArrayCopy {
public static void main(String[] args) {
int [] a = {1,2,3,4};
int [] b = {5,6,7,8};
int [] c = null;
int alength = a.length;
int blength = b.length;
int clength = a.length + b.length;
c = new int[clength];
System.arraycopy(a,0,c,0,alength);
System.arraycopy(b,0,c,alength,blength);
for(int i = 0;i < clength;i++) {
System.out.println(c[i]);
}
}
}

[alpha2007]

两个无序数组合并并且排序的话：
public class acopy {

public static void main(String[] args) {
int a[] = {1,13,9,4};
int b[] = {5,11,7,8};
int c[] = combine(a,b);


}
public static int[] combine(int[] a, int[] b)
{
int alen = a.length;
int blen = b.length;
int clen = alen+blen;

//数组合并
int i,j;
int temp;
int[] c = new int[clen];
System.arraycopy(a,0,c,0,alen);
System.arraycopy(b,0,c,alen,blen);

//数组元素按递增排序
for(i=0;i<clen;i++)
{
for(j=0;j<clen-i-1;j++)
{
if(c[j]>c[j+1])
{temp=c[j];
c[j]=c[j+1];
c[j+1]=temp;}
else{}

}
}

for(int k=0;k<clen;k++)
System.out.println(c[k]);
return c;

}

}

[treeroot]

arraycopy
Arrays.sort

[feirne2004]

不错

[我自横刀香甜笑]

正解。顶

[网络咖啡]

arraycopy

[紫炎圣骑]

楼上正解

[紫炎圣骑]

int a[] = {1,2,3};
int b[] = {4,5,6};
int c[] = new int[6];
System.arraycopy(a,0,c,0,a.length);
System.arraycopy(b,0,c,3,b.length);
for (int i = 0; i < c.length; i++)
{
System.out.println(c[i]);
}