你知道在Java中Integer和int的这些区别吗?

public static boolean comp(){
        Integer i1=new Integer(10);
        Integer i2=new Integer(10);
        return i1==i2;
    }

public static boolean comp1(){
        Integer i1=new Integer(10);
        Integer i2=10;
        return i1==i2;
    }

public static void comp2(){
        Integer i = 100;
        Integer j = 100;
        System.out.print(i == j);

        Integer m = 128;
        Integer n = 128;
        System.out.print(m == n);
    }

Integer i = new Integer(10); //自动拆箱为 int i=10; 此时，相当于两个int的比较
int j = 10；
System.out.print(i == j); //true

public static void comp3(){
        int i = 128;
        Integer i2 = 128;
        Integer i3 = new Integer(128);

        System.out.println("i == i2 = " + (i == i2)); // Integer会自动拆箱为int，所以为true
        System.out.println("i == i3 = " + (i == i3)); // true，理由同上

        Integer i4 = 127;// 编译时被翻译成：Integer i4 = Integer.valueOf(127);
        Integer i5 = 127;
        System.out.println("i4 == i5 = " + (i4 == i5));// true

        Integer i6 = 128;
        Integer i7 = 128;
        System.out.println("i6 == i7 = " + (i6 == i7));// false

        Integer i8 = new Integer(127);
        System.out.println("i5 == i8 = " + (i5 == i8)); // false

        Integer i9 = new Integer(128);
        Integer i10 = new Integer(128);
        System.out.println("i9 == i10 = " + (i9 == i10)); // false
    }

public static void comp4(){
        Integer a = new Integer(127), b = new Integer(128);

        int c = 127, d = 128, dd = 128;
        Integer e = 127, ee = 127, f = 128, ff = 128;

        System.out.println(a == b); // false 因为a,b都是new出来的对象，地址不同所以为false
        System.out.println(a == c); // true a会自动拆箱为int类型
        System.out.println(a == e); // false 指向的地址不同a是new出来的

        System.out.println(e == c); // true e会自动拆箱为int类型
        System.out.println(e == ee);// true Integer对 处于-128到127范围之间，指向了同一片地址区域

        System.out.println(b == f); // false 指向的地址不同b是new出来的
        System.out.println(f == d); // true f自动拆箱为int类型

        System.out.println(f == ff); /*
         * false 指向的不是同一片地址区域。
         * 在Integer类型中，-128到127存放的是同一片区域地址，
         * 之外的数是另外开辟空间来进行 存储的
         */
        System.out.println(d == dd); // true 不解释
    }

public static void comp5(){
        Integer i01 = 59;
        int i02 = 59;
        Integer i03 =Integer.valueOf(59);
        Integer i04 = new Integer(59);
        System.out.println(i01 == i02);//true
        System.out.println(i01 == i03);//true
        System.out.println(i03 == i04);//false
        System.out.println(i02 == i04);//true
    }

public static void comp6(){
        Integer i01 = 128;
        int i02 = 128;
        Integer i03 = Integer.valueOf(128);
        Integer i04 = new Integer(128);
        System.out.println(i01 == i02);//true
        System.out.println(i01 == i03);//false
        System.out.println(i03 == i04);//false
        System.out.println(i02 == i04);//true
    }