java

[weili86yy]

2、编写一个程序，这个程序把一个整数数组中的每个元素用逗号连接成一个字符串，例如，根据内容为[1][2][3]的数组形成内容为"1,2,3"的字符串。

[masse]

public static String join(int[] array) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < array.length; i++) {
sb.append(array[i]);
if (i < array.length - 1) {
sb.append(COMMA);
}
}
return sb.toString();
}

[masse]

public static final char COMMA = ',';

public static String join(int[] array) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < array.length; i++) {
sb.append(array[i]);
if (i < array.length - 1) {
sb.append(COMMA);
}
}
return sb.toString();
}

[zjf405]

楼上的你的动作还真是快哎~
int[] array = new int[]{0,1,2,3,4};
StringBuffer strBuf = new StringBuffer();
for(int i=0; i<array.length;i++){
if(i != array.length-1){
strBuf.append(array[i]+",");
}else{
strBuf.append(array[i]);
}
}
String str = strBuf.toString();
System.out.println(str);

[zjf405]

你写的比我好，我不该贴的~

[火龙果被占用了]

int[] nums = {1,2,3,4,5,6,7,8};
String str = Arrays.toString(nums);
str = str.substring(1, str.length()-1);
System.out.println(str);

[火龙果被占用了]

int[] nums = {1,2,3,4,5,6,7,8};
StringBuffer sb = new StringBuffer();
for(int i = 0; i <n ums.length; i++){
　　sb.append(nums[i]);
　　sb.append(i < nums.length - 1 ? "," : "");
}
System.out.println(sb.toString());