Search sub string « StringBuilder « Character String « Development

Return	Method	Summary
int	indexOf(String str)	Returns the index within this string of the first occurrence of the specified substring.
int	indexOf(String str, int fromIndex)	Returns the index within this string of the first occurrence of the specified substring, starting at the specified index.
int	lastIndexOf(String str)	Returns the index within this string of the rightmost occurrence of the specified substring.
int	lastIndexOf(String str, int fromIndex)	Returns the index within this string of the last occurrence of the specified substring.


public class Main {
  public static void main(String[] argv) {
    StringBuilder sb = new StringBuilder();
    sb.append("java2s.com");
    
    int index = sb.indexOf("com");
    
    System.out.println(index);

  }
}


public class Main {
  public static void main(String[] argv) {
    StringBuilder sb = new StringBuilder();
    sb.append("java2s.com");
    sb.append(123);
    sb.append(1.23);
    sb.append(true);
    sb.insert(4,"JAVA2S.COM");
    System.out.println(sb.toString());

  }
}


javaJAVA2S.COM2s.com1231.23true