Java中如何把两个数组合并为一个

Question

如题所述

Answer 1

import java.util.Arrays;

//Java中如何把两个数组合并为一个
public class gog {
public static void main(String[] args) {
String [] str1 = {"J","a","v","a","中"};
String [] str2 = {"如","何","把","两","个","数","组","合","并","为","一","个"};

int strLen1=str1.length;//保存第一个数组长度
int strLen2=str2.length;//保存第二个数组长度
str1= Arrays.copyOf(str1,strLen1+ strLen2);//扩容
System.arraycopy(str2, 0, str1, strLen1,strLen2 );//将第二个数组与第一个数组合并
System.out.println(Arrays.toString(str1));//输出数组

}
}

Answer 2

int[] s ={4, 7, 2, 3, 1 ,10, 6, 5 ,9 ,8};
int[] s2 = {4,6,2,10,24,9,30,7};
int a[]=new int[s.length+s2.length]; //定义一个长度为s加s2长度的数组
System.arraycopy(s,0,a,0,s.length); //将数组s的元素复制到a中
System.arraycopy(s2,0,a,s.length,s2.length); //将数组s2的元素复制到a中
for(int i=0;i<a.length;i++) //输出新的数组元素a
System.out.println(a[i]);

Answer 3

java数组合并问题

三种字符数组合并的方法

public static String[] getOneArray() {
String[] a = { "0", "1", "2" };
String[] b = { "0", "1", "2" };

String[] c = new String[a.length + b.length];

for (int j = 0; j < a.length; ++j) {
c[j] = a[j];
}

for (int j = 0; j < b.length; ++j) {
c[a.length + j] = b[j];
}

return c;
}

public static Object[] getTwoArray() {
String[] a = { "0", "1", "2" };
String[] b = { "0", "1", "2" };

List aL = Arrays.asList(a);
List bL = Arrays.asList(b);

List resultList = new ArrayList();
resultList.addAll(aL);
resultList.addAll(bL);

Object[] result = resultList.toArray();
return result;
}

public static String[] getThreeArray() {
String[] a = { "0", "1", "2", "3" };
String[] b = { "4", "5", "6", "7", "8" };
String[] c = new String[a.length + b.length];
System.arraycopy(a, 0, c, 0, a.length);
System.arraycopy(b, 0, c, a.length, b.length);
return c;
}

1.两个字符数组合并的问题

public String[] getMergeArray(String[] al,String[] bl) {
String[] a = al;
String[] b = bl;
String[] c = new String[a.length + b.length];
System.arraycopy(a, 0, c, 0, a.length);
System.arraycopy(b, 0, c, a.length, b.length);
return c;
}

2.字符数组和整形数组合并问题

public int[] getIntArray(int[] al,String[] bl) {
int[] a = al;
String[] b = bl;

int[] ia=new int[b.length];
for(int i=0;i<b.length;i++){
ia[i]=Integer.parseInt(b[i]);
}

int[] c = new int[a.length + ia.length];
System.arraycopy(a, 0, c, 0, a.length);
System.arraycopy(ia, 0, c, a.length, ia.length);
return c;
}

Answer 4

package 数组与数组合并;
import java.util.Arrays;

//Java中如何把两个数组合并为一个
public class gog {
public static void main(String[] args) {
String [] str1 = {"J","a","v","a","中"};
String [] str2 = {"如","何","把","两","个","数","组","合","并","为","一","个"};

int strLen1=str1.length;//保存第一个数组长度
int strLen2=str2.length;//保存第二个数组长度
str1= Arrays.copyOf(str1,strLen1+ strLen2);//扩容
System.arraycopy(str2, 0, str1, strLen1,strLen2 );//将第二个数组与第一个数组合并
System.out.println(Arrays.toString(str1));//输出数组

}
}

Answer 5

 static Object[] merge(Object[] a1, Object[] a2) {
  Object[] a3 = new Object[a1.length + a2.length];
  System.arraycopy(a1, 0, a3, 0, a1.length);
  System.arraycopy(a2, 0, a3, a1.length, a2.length);
  return a3;
 }