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public class Test_1_2 {
static int b = 9;
static int c;
static {
b = 6;
System.out.println("----------------");
}
public static void main(String[] args) {
System.out.println(Test_1_2.b);
}
}
class AB {
static{
System.out.println("我来了。。。AB");
}
private static AB obj = new AB();
public static int num1 ;
public static int num2 = 0;
private AB() {
System.out.println("我来了。。。AB构造函数");
num1++;
num2++;
// ystem.out.println(+num1);
// ystem.out.println(+num2);
}
public static AB getInstance() {
System.out.println("我来了。。。实例");
return obj;
}
}
public class CsdnTest {
static{
System.out.println("我来了。。。CsdnTest");
}
public static void main(String[] args) {
System.out.println("我来了。。。main");
AB obj = AB.getInstance();
System.out.println("obj.num1=" + obj.num1);
System.out.println("obj.num2=" + obj.num2);
double f = 111231.5585;
BigDecimal b = new BigDecimal(f);
double f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
System.out.println(f1);
}
}