Java 原型变量和引用
Code list:
class Value { int val; }
class Test {
public static void main(String[] args) {
int i1 = 3;
int i2 = i1;
i2 = 4;
System.out.print("i1==" + i1);
System.out.println(" but i2==" + i2);
Value v1 = new Value();
v1.val = 5;
Value v2 = v1;
v2.val = 6;
System.out.print("v1.val==" + v1.val);
System.out.println(" and v2.val==" + v2.val);
}
}
运行结果: class Test {
public static void main(String[] args) {
int i1 = 3;
int i2 = i1;
i2 = 4;
System.out.print("i1==" + i1);
System.out.println(" but i2==" + i2);
Value v1 = new Value();
v1.val = 5;
Value v2 = v1;
v2.val = 6;
System.out.print("v1.val==" + v1.val);
System.out.println(" and v2.val==" + v2.val);
}
}
E:\temp\JavaDemos\Chapter4>java Test i1==3 but i2==4 v1.val==6 and v2.val==6 |