Java tutorial
public class Main { public static void main(String[] args) { boolean b = true; StringBuffer sb1 = new StringBuffer("1234567890"); sb1.insert(6, b); System.out.println(sb1); char c = 'Y'; sb1.insert(6, c); System.out.println(sb1); char[] c1 = new char[] { 'Y', 'e', 's' }; sb1.insert(6, c1); System.out.println(sb1); double d = 1.0; sb1.insert(6, d); System.out.println(sb1); float f = 2.0f; sb1.insert(6, f); System.out.println(sb1); int i = 5; sb1.insert(6, i); System.out.println(sb1); long l = 10; sb1.insert(6, l); System.out.println(sb1); Object obj = new String("b"); sb1.insert(6, obj); System.out.println(sb1); String str = "a"; sb1.insert(6, str); System.out.println(sb1); } } /* 123456true7890 123456Ytrue7890 123456YesYtrue7890 1234561.0YesYtrue7890 1234562.01.0YesYtrue7890 12345652.01.0YesYtrue7890 1234561052.01.0YesYtrue7890 123456b1052.01.0YesYtrue7890 123456ab1052.01.0YesYtrue7890 */