// DrJava saved history v2 import java.util.*; StringTokenizer st = new StringTokenizer("My name is Jen."); st.countTokens() st.nextToken() st.countTokens() HelperExample.revCharsInSent("Today is Friday. Hello."); HelperExample.revCharsInSent("Today is Friday. Hello.") HelperExample.revCharsInSent("Today is Friday. Hello.") int x; x int[] y; // y is a reference for an array of ints y = new int[5]; y[0] y[0] = 1; y[1] = 2; // The array referenced by y has 5 elements. Student[] s; char[] c; c c = new char[3]; c c[0] (int) c[0] c.length String s; String l; l