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LeftRotateString.java
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75 lines (59 loc) · 1.74 KB
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public class LeftRotateString {
public static void main(String [] args)
{
test t=new test();
System.out.println(t.LeftRotateString("",6));
System.out.println(t.LeftRotateString1("sdsada",21));
}
}
class test {
public String LeftRotateString(String str, int n) {
if(str.length() == 0){
return str;
}
if (n == 0 || n % str.length() == 0 ) {
return str;
}
if (n > str.length()) {
n = n % str.length();
String ot="";
char s[]=str.toCharArray();
for(int i=n;i<s.length;i++){
ot=ot+s[i];
}
for(int j=0;j<n;j++){
ot=ot+s[j];
}
return ot;
} else {
String ot="";
char s[]=str.toCharArray();
for(int i=n;i<s.length;i++){
ot=ot+s[i];
}
for(int j=0;j<n;j++){
ot=ot+s[j];
}
return ot;
}
}
public String LeftRotateString1(String str, int n){
if(str.length()==0){
return str;
}
if(n<=str.length()){
StringBuilder str1=new StringBuilder(str);
StringBuilder str2=new StringBuilder(str);
String s1= str1.substring(0,n);
String s2= str2.substring(n,str.length());
return s2+s1;
}else{
n=n%str.length();
StringBuilder str1=new StringBuilder(str);
StringBuilder str2=new StringBuilder(str);
String s1= str1.substring(0,n);
String s2= str2.substring(n,str.length());
return s2+s1;
}
}
}