try.java

Java是最优秀的高级编程语言之一,多项式的加法运算,体现了链表数据结构的优势.

import java.lang.*;
import java.util.*;
class Try{
	public static void main(String[] args){
		String i="0123456";
		System.out.println(i.substring(0,1));
		i=null;//you can try the substract in string
		System.out.println(i==null);
		char k='6';
		boolean t=false;
		if(!t)
			System.out.println(t);
		System.out.println((int)k);
		i="2321323413";
		System.out.println(i.indexOf("1",4));// you can try 3;
		System.out.println(i.substring(2,6));
		System.out.print(i.indexOf("4",-1));
		String expression="(3.12+2*3)/2+4";
		StringTokenizer token=new StringTokenizer(expression,"()+-/*");
		if(token.hasMoreTokens())
			System.out.println(token.nextToken());
		int n=0;
		String b=token.nextToken();
		int offset=b.length();
		System.out.println(expression.indexOf(token.nextToken(),n));
		double d=164.02415;
		i=Double.toString(d);
		System.out.println(i);
		}
	}