indexofexample.java

来自「java 完全探索的随书源码」· Java 代码 · 共 46 行

public class IndexOfExample
{
  // Default Constructor
  public IndexOfExample()
  {
    super();
  }

  // Method that actually performs the search
  public int doSearch( String str, String subStr )
  {
    return str.indexOf( subStr );
  }

  // Main Method
  public static void main( String[] args )
  {
    if ( args.length != 2 )
    {
      System.out.println( "Usage: java IndexOfExample <String> <Substring>" );
      System.exit( 0 );
    }

    // Create an instance of the example
    IndexOfExample example = new IndexOfExample();
    // Get the strings passed in from the command line
    String str = args[0];
    String subStr = args[1];

    // Inform the user what is going on
    System.out.println( "Searching string: " + str + " for: " + subStr );

    // perform the search
    int index = example.doSearch( str, subStr );

    // check the result
    if ( index != -1 )
    {
      System.out.println( "Found the substring at position " + index );
    }
    else
    {
      System.out.println( "Did not find the substring" );
    }
  }
}