BigInteger类

package com.jacky;

import java.math.BigInteger;

public class IntegerDemo {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		Integer i = new Integer(100);
		System.out.println(Integer.MAX_VALUE);
		System.out.println(Integer.MIN_VALUE);

		BigInteger bi = new BigInteger("2147483648");
		System.out.println("bi:" + bi);
	}
}

import java.math.BigInteger;

/*	
 * public BigInteger add(BigInteger val);//加
 * public BigInteger subtract(BigInteger val);//减
 * public BigInteger multiply(BigInteger val);//乘
 * public BigInteger divide(BigInteger val);//除
 * public BigInteger[] divideAndRemainder(BigInteger val);//返回商和余数的数组
 * */

public class IntegerDemo {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		BigInteger bi1 = new BigInteger("100");
		BigInteger bi2 = new BigInteger("50");

		System.out.println("add:" + bi1.add(bi2));
		System.out.println("subtract:" + bi1.subtract(bi2));
		System.out.println("multiply:" + bi1.multiply(bi2));
		System.out.println("divide:" + bi1.divide(bi2));

		BigInteger bis[] = bi1.divideAndRemainder(bi2);
		System.out.println("商:" + bis[0]);
		System.out.println("余数、:" + bis[1]);
	}
}