Java 使用构造函数和valueOf（）方法创建整数对象之间的区别

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public class Main {

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  public static void main(String[] args) {

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    // Create two Integer objects using constructors

    /*来自 

     N o w J a v a . c o m - 时  代  Java*/

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    Integer iv1 = new Integer(25);

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    Integer iv2 = new Integer(25);

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    System.out.println("iv1 = iv1 = " + iv1 + ", iv2 = " + iv2);

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    // Compare iv1 and iv2 references

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    System.out.println("iv1 == iv2: " + (iv1 == iv2));

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    // Let us see if they are equal in values

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    System.out.println("iv1.equals(iv2): " + iv1.equals(iv2));/*from 时 代 J a v a - N o w J a v a . c o m*/

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    System.out.println("\nUsing the valueOf() method:");

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    // Create two Integer objects using the valueOf() 

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    Integer iv3 = Integer.valueOf(25);

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    Integer iv4 = Integer.valueOf(25);

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    System.out.println("iv3 = " + iv3 + ", iv4 = " + iv4);

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    // Compare iv3 and iv4 references

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