for example String str = "a,b,c,d,a,b "; Set set = new HashSet(); String[] v = str.split(","); for (int i=0; i<v.length; i++) { set.add(v[i]); } System.out.println(Arrays.toString(set.toArray(new String[0])));
楼上的好象不对.你运行下.import java.util.*; public class Test { public static void main(String[] args) { String str ="a,b,c,d,a,b"; String[] result = str.split(","); HashSet hs=new HashSet(); for(int i=0;i<result.length;i++){ hs.add(result[i]); } System.out.println(hs); Iterator it=hs.iterator(); int j=0; String[] re = new String[hs.size()]; while(it.hasNext()) //去掉重复后附给数组 { re[j]=(String)it.next(); j++; } Arrays.sort(re); //排序 for(int m=0;m<re.length;m++){ //输出 System.out.print(re[m]+","); } System.out.println(); }}
看看行不行public class compare{
public static void main(String[] args){ String testString = "asdasewdskdklowiuernvknsdkl"; for(int ind=0;ind<testString.length();ind++){ Character b = testString.charAt(ind); int charInd=ind+1; while(charInd<testString.length()) { if(testString.charAt(charInd)==b) { testString=testString.substring(0,charInd)+testString.substring(charInd+1,testString.length()); } charInd++; } } System.out.println(testString);
}
}
上面的好像有点问题 import java.util.HashMap; import java.util.Map; public class compare{
String str = "a,b,c,d,a,b ";
Set set = new HashSet();
String[] v = str.split(",");
for (int i=0; i<v.length; i++) {
set.add(v[i]);
}
System.out.println(Arrays.toString(set.toArray(new String[0])));
public class Test { public static void main(String[] args) {
String str ="a,b,c,d,a,b";
String[] result = str.split(","); HashSet hs=new HashSet();
for(int i=0;i<result.length;i++){
hs.add(result[i]);
}
System.out.println(hs);
Iterator it=hs.iterator();
int j=0;
String[] re = new String[hs.size()];
while(it.hasNext()) //去掉重复后附给数组
{
re[j]=(String)it.next();
j++;
}
Arrays.sort(re); //排序
for(int m=0;m<re.length;m++){ //输出
System.out.print(re[m]+",");
}
System.out.println();
}}
public static void main(String[] args){ String testString = "asdasewdskdklowiuernvknsdkl";
for(int ind=0;ind<testString.length();ind++){
Character b = testString.charAt(ind);
int charInd=ind+1;
while(charInd<testString.length())
{
if(testString.charAt(charInd)==b)
{
testString=testString.substring(0,charInd)+testString.substring(charInd+1,testString.length());
}
charInd++;
}
}
System.out.println(testString);
}
}
import java.util.HashMap;
import java.util.Map;
public class compare{
public static void main(String[] args){ String testString = "aaaaaasdsdsdsssdjkls;ljs;dlfkjiewroipquwjsndvkjxhvclkashdfd";
String result="";
Map map=new HashMap();
for(int ind=0;ind<testString.length();ind++){
Character b = testString.charAt(ind);
if(map.get(b)==null)
{
map.put(b, b);
result+=b;
}
}
System.out.println(result);
}
}