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MyStringBuilder2.java
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MyStringBuilder2.java
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public class MyStringBuilder2 {
// add data member
String mystring = "";
public MyStringBuilder2() {};
public MyStringBuilder2(char[] chars) {
this.mystring = chars.toString();
};
public MyStringBuilder2(String s) {
mystring = s;
};
public MyStringBuilder2 insert(int offset, MyStringBuilder2 s) {
// modify on mystring
if (offset < 0){
this.mystring = s.toString() + this.mystring;
return this;
}
if (offset >= mystring.length()) {
// change mystring
mystring += s.toString();
return this;
}
String newstring = "";
for (int index=0; index<offset;index++)
newstring += mystring.charAt(index);
newstring += s.toString();
newstring += this.substring(offset + 1).toString();
this.mystring = newstring;
return this;
}
public MyStringBuilder2 reverse() {
// can use some techniques used in the above method insert
return this;
}
public MyStringBuilder2 substring(int begin) {
// can use some techniques used in the above method insert
return this;
}
public MyStringBuilder2 toUpperCase() {
return this;
}
public String toString() {
return mystring;
}
}