我知道这个问题被多次询问过，但我没有找到任何有用的答案。我有一个接收String的方法。我想检查字符串中的任何字符是否重复。如果是这样，该方法将返回一个空字符串。如果不是，它将返回String。 该方法正在查找字符串中的任何重复字符。
@font-face {
font-family: 'UbuntuM'; /*a name to be used later*/
src: url('../fonts/ubuntu-font-family/0.80/Ubuntu-M.ttf'); /*URL to font*/
}
@font-face {
font-family: 'UbuntuR'; /*a name to be used later*/
src: url('../fonts/ubuntu-font-family/0.80/Ubuntu-R.ttf'); /*URL to font*/
}
@font-face {
font-family: 'ubuntu-light'; /*a name to be used later*/
src: url('../fonts/ubuntu-font-family/0.80/ubuntu-light.woff'); /*URL to font*/
}
* {
font-size:1em;
box-sizing: border-box;
}
*:after, *:before {
box-sizing: border-box;
}
html,body {
height:100%;
width:100%;
margin:0;
}
body {
color:#5c5c5c;
font-family: 'UbuntuR';
}
.clear_both {
clear:both;
}
.mediumfont {
font-family: 'UbuntuM';
}
header {
box-sizing: border-box;
height:60px;
line-height:45px;
text-align:center;
position: absolute;
top:0;
left:0;
right:0;
width:100%;
background-color:#ecedec;
color:#5c5c5c;
padding:5px;
border-bottom: 10px solid #d7d7d7;
}
#headertitle,
.weather_header {
font-family: 'ubuntu-light';
padding-left: 10px;
font-size:20px;
line-height:42px;
}
.header_icon > a{
font-size: 25px;
padding: 0 7px;
color: #5c5c5c;
}
#content {
box-sizing: border-box;
position: absolute;
top:60px;
bottom:0px;
left:0;
right:0;
width:100%;
background-color:#ecedec;
color:#000000;
overflow-y: auto;
padding:5px;
}
#content .tab {
overflow: hidden;
position:relative;
margin:5px;
}
#content .tab_list {
/*
position: absolute;
bottom: 0;
top: 0px;
left: 0;
right: 0;
*/
}
#content .tab,
.weather_data_wrapper {
/*position: absolute;
top: 0;
bottom: 0;
overflow-y: auto;
right: 0;
left: 0;
*/
}
/*
footer {
height:30px;
line-height:30px;
text-align:center;
position: absolute;
bottom:0;
left:0;
right:0;
width:100%;
background-color:red;
padding:5px;
}
*/
.about_logo_wrapper {
text-align: center;
margin-top:10px;
}
.about_logo_wrapper > img {
width:33%;
height:auto;
display:inline-block;
}
.about_text_wrapper {
text-align:center;
}
.about_title {
display: block;
margin: 10px;
font-size: 1.5em;
margin-bottom: 2px;
}
.about_template ul {
list-style: none;
padding:0;
}
.about_template ul li{
margin:5px;
}
.about_desc {
margin-top:35px 0px;
}
#errorOverlay,
#loadingOverlay {
background-color:rgba(255, 255, 255, 0.5);
position:absolute;
top:0;
bottom:0;
left:0;
right:0;
z-index:100
}
.error_overlay_wrapper{
position: absolute;
left: 50%;
top: 50%;
text-align: center;
width:100%;
height:10%;
margin-left: -50%; /*half width*/
margin-top: -5%; /*half height*/
}
.loading_overlay_wrapper{
position: absolute;
left: 50%;
top: 50%;
text-align: center;
width:100px;
height:100px;
margin-left: -50px; /*half width*/
margin-top: -50px; /*half height*/
}
img {
max-width:100%;
max-height:100%;
}
/*
.hourly_weather_date_day,
.daily_weather_date_day,
.hourly_weather_desc,
.daily_weather_desc,
.detail_info_weather
*/
.hourly_weather_desc,
.daily_weather_desc {
font-size:0.75em;
}
.weather_data,
.detail_info_weather,
.summary_info_weather {
color: #FFFFFF;
}
.hourly_weather > .detail_info_weather,
.daily_weather > .detail_info_weather
{
display:none;
}
.hourly_weather.show_weather_detail > .detail_info_weather,
.daily_weather.show_weather_detail > .detail_info_weather
{
display:block;
}
.weather_data {
padding: 5px;
}
.hourly_weather.weather_data,
.daily_weather.weather_data
{
margin-bottom:5px;
}
.current_weather_desc,
.hourly_weather_desc,
.daily_weather_desc {
text-transform: capitalize;
}
.detail_temp_min_max_group {
display:inline-block;
}
.detail_icon {
height:1em;
}
.detail_icon_bkg {
background-size: 18px;
padding-left:20px;
background-repeat: no-repeat;
background-position: left center;
}
.detail_icon_sunrise_bkg {
background-image:url(/img/details_icon/icon_sunrise.svg);
}
.detail_icon_sunset_bkg {
background-image:url(/img/details_icon/icon_sunset.svg);
}
.detail_icon_temp_bkg {
background-image:url(/img/details_icon/icon_temp.svg);
}
.detail_icon_temp_min_max_bkg {
background-image:url(/img/details_icon/icon_temp_min_max.svg);
}
.detail_icon_pressure_bkg {
background-image:url(/img/details_icon/icon_pressure.svg);
}
.detail_icon_humidity_bkg {
background-image:url(/img/details_icon/icon_humidity.svg);
}
.detail_icon_cloud_bkg {
background-image:url(/img/details_icon/icon_cloud.svg);
}
.detail_icon_rain_bkg {
background-image:url(/img/details_icon/icon_rain.svg);
}
.detail_icon_wind_orientation_bkg {
background-image:url(/img/details_icon/icon_wind_orientation.svg);
}
.detail_icon_wind_speed_bkg {
background-image:url(/img/details_icon/icon_wind_speed.svg);
}
.summary_info_current_weather {
text-align:center;
}
.current_weather_logo {
width: 50%;
display:inline-block;
}
/*black*/
.weather_data.weather_200,
.weather_data.weather_201,
.weather_data.weather_202,
.weather_data.weather_210,
.weather_data.weather_211,
.weather_data.weather_212,
.weather_data.weather_221,
.weather_data.weather_230,
.weather_data.weather_231,
.weather_data.weather_232,
.weather_data.weather_900,
.weather_data.weather_901,
.weather_data.weather_902,
.weather_data.weather_903,
.weather_data.weather_904,
.weather_data.weather_905,
.weather_data.weather_906,
.weather_data.weather_950,
.weather_data.weather_951,
.weather_data.weather_952,
.weather_data.weather_953,
.weather_data.weather_954,
.weather_data.weather_955,
.weather_data.weather_956,
.weather_data.weather_957,
.weather_data.weather_958,
.weather_data.weather_959,
.weather_data.weather_960,
.weather_data.weather_961,
.weather_data.weather_962
{
background-color:#000000;
}
/*blue*/
.weather_data.weather_300,
.weather_data.weather_301,
.weather_data.weather_302,
.weather_data.weather_310,
.weather_data.weather_311,
.weather_data.weather_312,
.weather_data.weather_321,
.weather_data.weather_500,
.weather_data.weather_501,
.weather_data.weather_502,
.weather_data.weather_503,
.weather_data.weather_504,
.weather_data.weather_511,
.weather_data.weather_520,
.weather_data.weather_521,
.weather_data.weather_522,
.weather_data.weather_531,
.weather_data.weather_600,
.weather_data.weather_601,
.weather_data.weather_602,
.weather_data.weather_611,
.weather_data.weather_621
{
background-color:#55AAFF;
}
/*gray*/
.weather_data.weather_701,
.weather_data.weather_711,
.weather_data.weather_721,
.weather_data.weather_731,
.weather_data.weather_741,
.weather_data.weather_751,
.weather_data.weather_761,
.weather_data.weather_762,
.weather_data.weather_771,
.weather_data.weather_781,
.weather_data.weather_802,
.weather_data.weather_803,
.weather_data.weather_804
{
background-color:#808080;
}
/*yellow*/
.weather_data.weather_800,
.weather_data.weather_801
{
background-color:#E0B000;
}
/*night*/
.weather_data.night {
background-color:#41403b;
}
.daily_weather_logo,
.hourly_weather_logo {
width: 100px;
display:inline-block;
}
.weather_header {
padding:0px;
position: relative;
}
.weather_header_wrapper {
margin:5px;
background-color:#d7d7d7;
}
.weather_header_wrapper > div {
text-align:center;
}
.row_weather > div {
text-align:center;
}
.row_weather {
display: table;
width:100%;
table-layout: fixed;
}
.row_weather > div span {
display: inline-block;
width:100%;
}
.row_weather [class*="col-"] {
float: none;
display: table-cell;
vertical-align: middle;
}
.align-left {
text-align:left;
}
.weather_data .separator
{
margin-top: 10px;
padding-bottom: 10px;
}
.separator {
text-align:center;
line-height: 1px;
height: 1px;
position: relative;
background-color:transparent;
}
.separator > span {
display: inline-block;
border-top: 1px solid #FFFFFF;
position: absolute;
top: 0;
bottom: 0;
right: 10%;
left: 10%;
}
.weather_type {
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
}
.weather_chooser {
position:relative;
}
.container-centered {
height: 100%;
text-align: center; /* align the inline(-block) elements horizontally */
font: 0/0 a; /* remove the gap between inline(-block) elements */
}
.container-centered:before { /* create a full-height inline block pseudo=element */
content: ' ';
display: inline-block;
vertical-align: middle; /* vertical alignment of the inline element */
height: 100%;
}
.elem-centered {
display: inline-block;
vertical-align: middle; /* vertical alignment of the inline element */
font: 16px/1 Arial sans-serif; /* <-- reset the font property */
}
答案 0 :(得分：3)
好的，我发布了我的解决方案：
{Tue, 28 Jul 2015=>100}答案 1 :(得分：0)
这可能不是做你想做的最好的方法，但是你可以使用两个for循环来检查每个字符与其他所有字符是否重复。
public static String hasRepeated(String word) {
if (word.isEmpty()) return "<empty>";
char[] charArray = word.toCharArray();
for (int i = 0; i < charArray.length; i++) {
for (int j = 0; j < charArray.length; j++) {
if (i == j) {
} else if (Character.toString(charArray[i]).
equalsIgnoreCase(Character.toString(charArray[j]))) {
return "";
}
}
}
return word;
}
注意：此代码假定角色的情况并不重要，只是检查它是否重复。
答案 2 :(得分：0)
/**
* Returns the index of the first character repeated, or -1 if no repeats
*/
public static int firstRepeated( String s ) {
if ( s != null ) {
int n = s.length();
for (int i = 0; i < (n - 1); i++) {
int indx = s.indexOf( s.charAt( i ), i + 1 );
if ( indx > 0 ) {
return i;
}
}
}
return -1;
}
答案 3 :(得分：-2)
这有效!!
public static String checkDuplicate(String str)
{
int count = 0;
char[] charArray = str.toCharArray();
for(int i=0;i<charArray.length;i++)
{
count = 0;
for(int j=0;j<charArray.length;j++)
{
if(charArray[i]==charArray[j])
{
count++;
if(count==2) break;
}
}
if(count==2) break;
}
if(count==2)
return "";
else
return str;
}
}