字符串比较遇到的坑

字符串比较会导致8大于13，原因在于字符串比较是基于下标的char比较的；
Integer的比较==同样的值是false；其余的几种方法都可以；

package org.lambda;

public class StringCompareTest {
    public static void main(String[] args) {
        StringCompareTest stringCompareTest = new StringCompareTest();
        stringCompareTest.compareString("8","13");
        stringCompareTest.compareInteger();
    }
    public void compareString(String a, String b){
        int i = a.compareTo(b);
        System.out.println(i);
    }
    public void compareInteger(){
        for(int i =125; i < 130; i++){
            Integer i1 = new Integer(i);
            Integer i2 = new Integer(i);
            System.out.println(i1.compareTo(i2));
        }
        System.out.println("------------------------------");
        for(int i =125; i < 130; i++){
            Integer i1 = new Integer(i);
            Integer i2 = new Integer(i);
            System.out.println(i1.equals(i2));
        }
        System.out.println("------------------------------");
        for(int i =125; i < 130; i++){
            Integer i1 = new Integer(i);
            Integer i2 = new Integer(i);
            System.out.println(i1.intValue() == i2.intValue());
        }
        System.out.println("------------------------------");
        for(int i =125; i < 130; i++){
            Integer i1 = new Integer(i);
            Integer i2 = new Integer(i);
            System.out.println(i1 == i2);
        }
    }

}