Java 拆分最后一个空格为Max个字符的字符串
我正在尝试拆分最后一个空格为最大允许字符的字符串: 期望值:Java 拆分最后一个空格为Max个字符的字符串,java,string,split,Java,String,Split,我正在尝试拆分最后一个空格为最大允许字符的字符串: 期望值: John David Guetta MarkHenry An thoney Sam public static List<String> splitByLength(String str, int n) { List<String> returnList = new ArrayList<>(); StringBuilder sb = new StringBuilder();
John David Guetta MarkHenry An
thoney Sam
public static List<String> splitByLength(String str, int n) {
List<String> returnList = new ArrayList<>();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < str.length(); i++) {
if (i > 0 && (i % n == 0)) {
returnList.add(sb.toString());
sb = new StringBuilder();
}
sb.append(str.charAt(i));
}
if (StringUtils.isNoneBlank(sb.toString())) {
returnList.add(sb.toString());
}
return returnList;
}
String name=“John David Guetta MarkHenry Anthoney Sam”
允许的最大字符数:30
因此,它应该返回为:
John David Guetta MarkHenry
Anthoney Sam
实际结果:
John David Guetta MarkHenry An
thoney Sam
public static List<String> splitByLength(String str, int n) {
List<String> returnList = new ArrayList<>();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < str.length(); i++) {
if (i > 0 && (i % n == 0)) {
returnList.add(sb.toString());
sb = new StringBuilder();
}
sb.append(str.charAt(i));
}
if (StringUtils.isNoneBlank(sb.toString())) {
returnList.add(sb.toString());
}
return returnList;
}
代码:
John David Guetta MarkHenry An
thoney Sam
public static List<String> splitByLength(String str, int n) {
List<String> returnList = new ArrayList<>();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < str.length(); i++) {
if (i > 0 && (i % n == 0)) {
returnList.add(sb.toString());
sb = new StringBuilder();
}
sb.append(str.charAt(i));
}
if (StringUtils.isNoneBlank(sb.toString())) {
returnList.add(sb.toString());
}
return returnList;
}
公共静态列表splitByLength(字符串str,int n){
List returnList=new ArrayList();
StringBuilder sb=新的StringBuilder();
对于(int i=0;i0&(i%n==0)){
添加(sb.toString());
sb=新的StringBuilder();
}
某人附加(str.charAt(i));
}
if(StringUtils.isNoneBlank(sb.toString())){
添加(sb.toString());
}
退货清单;
}
您可以使用最多可接受30个字符的正则表达式:
String name = "John David Guetta MarkHenry Anthoney Sam";
Pattern p = Pattern.compile(".{1,30}(\\s+|$)");
Matcher m = p.matcher(name);
while(m.find()) {
System.out.println(m.group().trim());
}
请注意,
(\\s |$)
在空格上或到达初始字符串的结尾时中断。您可以使用最多可接受30个字符的正则表达式:
String name = "John David Guetta MarkHenry Anthoney Sam";
Pattern p = Pattern.compile(".{1,30}(\\s+|$)");
Matcher m = p.matcher(name);
while(m.find()) {
System.out.println(m.group().trim());
}
请注意,
(\\s |$)
在空格上或到达初始字符串的结尾时中断。我总是发现使用正则表达式很困难和麻烦,因此这里有一个我将使用的解决方案
private static void splitByLength(String str, int n) {
String newStr = "";
int splitIndex = 0;
for (int i = 0; i < str.length(); i++) {
if (str.charAt(i) != ' ') {
newStr = newStr + str.charAt(i); //Keep adding chars until you find a space
if (newStr.length() > n) { //If newStr's length exceeds 'n', break the loop
break;
}
} else {
splitIndex = i; //Store the last space index
newStr = newStr + ' ';
}
}
System.out.println(str.substring(0, splitIndex).trim()); //Use the splitIndex to print a substring
System.out.println(str.substring(splitIndex, str.length()).trim());
}
private静态void splitByLength(String str,int n){
字符串newStr=“”;
int-splitIndex=0;
对于(int i=0;in){//如果newStr的长度超过“n”,则中断循环
打破
}
}否则{
splitIndex=i;//存储最后一个空间索引
newStr=newStr+“”;
}
}
System.out.println(str.substring(0,splitIndex.trim());//使用splitIndex打印子字符串
System.out.println(str.substring(splitIndex,str.length()).trim());
}
我总是觉得使用正则表达式既困难又麻烦,所以这里有一个我将使用的解决方案
private static void splitByLength(String str, int n) {
String newStr = "";
int splitIndex = 0;
for (int i = 0; i < str.length(); i++) {
if (str.charAt(i) != ' ') {
newStr = newStr + str.charAt(i); //Keep adding chars until you find a space
if (newStr.length() > n) { //If newStr's length exceeds 'n', break the loop
break;
}
} else {
splitIndex = i; //Store the last space index
newStr = newStr + ' ';
}
}
System.out.println(str.substring(0, splitIndex).trim()); //Use the splitIndex to print a substring
System.out.println(str.substring(splitIndex, str.length()).trim());
}
private静态void splitByLength(String str,int n){
字符串newStr=“”;
int-splitIndex=0;
对于(int i=0;in){//如果newStr的长度超过“n”,则中断循环
打破
}
}否则{
splitIndex=i;//存储最后一个空间索引
newStr=newStr+“”;
}
}
System.out.println(str.substring(0,splitIndex.trim());//使用splitIndex打印子字符串
System.out.println(str.substring(splitIndex,str.length()).trim());
}