Java String subSequence() 方法 Java String startsWith(String prefix, int toffset) Java String substring() 方法 Java String subSequence() 方法 import java.io.*; public class Test { public static void main(String args[]) { String Str = new String("Welcome to codingdict.com"); System.out.print("Return Value :" ); System.out.println(Str.subSequence(0, 10) ); System.out.print("Return Value :" ); System.out.println(Str.subSequence(10, 15) ); } } Java String startsWith(String prefix, int toffset) Java String substring() 方法