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StringBuilder sb = new StringBuilder("sdfsf");
char d = 'd';
System.out.println(d);
sb.insert(0, d); //报错行
System.out.println(sb);
package mi;
public class TTT
{
public static void main(String[] args)
{
StringBuilder sb = new StringBuilder("sdfsf");
char d = 'd';
System.out.println(d);
sb.insert(0, d);
System.out.println(sb);
}
}
/**
* @throws IndexOutOfBoundsException {@inheritDoc}
*/
@Override
public StringBuilder insert(int offset, char c) {
super.insert(offset, c);
return this;
}