Question

java将字符串用逗号隔开

例如：String s="sssssss";
隔开成 s,s,s,s,s,s,s

Answer 1

public class Test {

public static void main(String[] args) {
String test = "ffd,dfdsf,fdsfds";
String[] rs = test.split(",");
for (int i = 0; i < rs.length; i++) {
System.out.println(rs[i]);
}

}
}
那应该是这样的：
public class Test {

public static void main(String[] args) {
String test = "ssssss";
StringBuffer temp = new StringBuffer();
for (int i = 0; i < test.length(); i++) {
temp.append(test.charAt(i)+",");

}
String rs = temp.substring(0,temp.length()-1);
System.out.println(rs);

}
}

Answer 2

String s = "ssssss";
StringBuffer a = new StringBuffer();
for (int i = 0; i <s.length(); i++) {
s.append(scharAt(i)+",");
}
String rs = a.substring(0,a.length()-1);
System.out.println(rs);

Answer 3

package test;
public class Test {
public static void main(String[] args) {
String s = "sssssssssssssssssssssssssss";
char[] s_arr = s.toCharArray();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < s_arr.length; i++) {
if (i != s_arr.length - 1) {
sb.append(String.valueOf(s_arr[i])).append(",");
} else {
sb.append(String.valueOf(s_arr[i]));
}
}
System.err.println(sb.toString());
}
}

Answer 4

String s = "ssssss";
String[] s1 = s.split("");
StringBuilder sb = new StringBuilder();
for (int i = 0; i < s1.length; i++) {
if (i != s1.length - 1) {
sb.append(s1[i] + ",");
} else {
sb.append(s1[i]);
}
}

Answer 5

public class Test{
public static void main(String[] args){
String s="ssssss";
String str="";
for(int i=0;i<s.length();i++){
if(i==s.length()-1){
str+=s.substring(i,i+1);
break;
}else{
str+=s.substring(i,i+1);
str+=",";
}
}
System.out.println(str);
}
}