问个静态变量和实例变量执行顺序的问题
public class StaticVariableTest {
private static StaticVariableTest svt = new StaticVariableTest();//语句(1)
private int count1=5;//语句(2)
private static int count2=6;//语句(3)
private StaticVariableTest(){//语句(4)
count1++;
count2++;
}
public static StaticVariableTest getInstance(){//语句(5)
return svt;
}
public int getCount1() {
return count1;
}
public void setCount1(int count1) {
this.count1 = count1;
}
public static int getCount2() {
return count2;
}
public static void setCount2(int count2) {
StaticVariableTest.count2 = count2;
}
public static void main(String[] args) {
StaticVariableTest svt = StaticVariableTest.getInstance();//语句(6)
System.out.println("count1:" + svt.getCount1());//语句(7)
System.out.println("count1:" + svt.getCount2());//语句(8)
}
}
对比下面一个
public class StaticVariableTest {
private static StaticVariableTest svt = new StaticVariableTest();//语句(1)
private static int count1=5;//语句(2)
private static int count2=6;//语句(3)
private StaticVariableTest(){//语句(4)
count1++;
count2++;
}
public static StaticVariableTest getInstance(){//语句(5)
return svt;
}
public static int getCount1() {
return count1;
}
public static setCount1(int count1) {
StaticVariableTest.count1 = count1;
}
public static int getCount2() {
return count2;
}
public static void setCount2(int count2) {
StaticVariableTest.count2 = count2;
}
public static void main(String[] args) {
StaticVariableTest svt = StaticVariableTest.getInstance();//语句(6)
System.out.println("count1:" + svt.getCount1());//语句(7)
System.out.println("count1:" + svt.getCount2());//语句(8)
}
}