public int indexOf(int ch);
public int indexOf(int ch, int fromIndex);

public int indexOf(String str);
public int indexOf(String str, int fromIndex);

package in.bench.resources.string.methods;

public class StringIndexOfMethod {

	public static void main(String[] args) {

		// sample string
		String str1 = "BenchResource.Net";

		// to get index of char 'R'
		int indexCh = str1.indexOf('R');

		// printing to console
		System.out.println("Index of char 'R' is : "
				+ indexCh);

		// to get index of char 'R',
		// starting from specified position
		int indexChfrom = str1.indexOf('r', 7);

		// printing to console
		System.out.println("Index of char 'r',"
				+ " starting from 7th position is : "
				+ indexChfrom);

		// to get index of substring 'Resource'
		int indexSubstring = str1.indexOf("Resource");

		// printing to console
		System.out.println("Index of substring 'Resource' is : "
				+ indexSubstring);

		// to get index of substring 'sour',
		// starting from specified pos
		int indexSubstringfrom = str1.indexOf("sour", 6);

		// printing to console
		System.out.println("Index of substring 'sour',"
				+ " starting from 6th position is : "
				+ indexSubstringfrom);
	}
}

Index of char 'R' is : 5
Index of char 'r', starting from 7th position is : 10
Index of substring 'Resource' is : 5
Index of substring 'sour', starting from 6th position is : 7