????iii.?漰?????????????
??????????????????漰?????????????.????漰??????????..?????????????.
??????????:
package com.thinking.in.java;
public class Main {
void f1(char x) {System.out.print("f1(char) ");}
void f1(byte x) {System.out.print("f1(byte) ");}
void f1(short x) {System.out.print("f1(short) ");}
void f1(int x) {System.out.print("f1(int) ");}
void f1(long x) {System.out.print("f1(long) ");}
void f1(float x) {System.out.print("f1(float) ");}
void f1(double x) {System.out.print("f1(double) ");}
void f2(byte x) {System.out.print("f2(byte) ");}
void f2(short x) {System.out.print("f2(short) ");}
void f2(int x) {System.out.print("f2(int) ");}
void f2(long x) {System.out.print("f2(long) ");}
void f2(float x) {System.out.print("f2(float) ");}
void f2(double x) {System.out.print("f2(double) ");}
void f3(short x) {System.out.print("f3(short) ");}
void f3(int x) {System.out.print("f3(int) ");}
void f3(long x) {System.out.print("f3(long) ");}
void f3(float x) {System.out.print("f3(float) ");}
void f3(double x) {System.out.print("f3(double) ");}
void f4(int x) {System.out.print("f4(int) ");}
void f4(long x) {System.out.print("f4(long) ");}
void f4(float x) {System.out.print("f4(float) ");}
void f4(double x) {System.out.print("f4(double) ");}
void f5(long x) {System.out.print("f5(long) ");}
void f5(float x) {System.out.print("f5(float) ");}
void f5(double x) {System.out.print("f5(double) ");}
void f6(float x) {System.out.print("f6(float) ");}
void f6(double x) {System.out.print("f6(double) ");}
void f7(double x) {System.out.print("f7(double) ");}
void testConstVal() {
System.out.print("5: ");
f1(5);f2(5);f3(5);f4(5);f5(5);f6(5);f7(5);
}
void testChar() {
char x = 'x';
System.out.print("char: ");
f1(x);f2(x);f3(x);f4(x);f5(x);f6(x);f7(x);
}
void testByte() {
byte x = 0;
System.out.print("byte: ");
f1(x);f2(x);f3(x);f4(x);f5(x);f6(x);f7(x);
}
void testShort() {
short x = 0;
System.out.print("short: ");
f1(x);f2(x);f3(x);f4(x);f5(x);f6(x);f7(x);
}
void testInt() {
int x = 0;
System.out.print("int: ");
f1(x);f2(x);f3(x);f4(x);f5(x);f6(x);f7(x);
}
void testLong() {
long x = 0;
System.out.print("long: ");
f1(x);f2(x);f3(x);f4(x);f5(x);f6(x);f7(x);
}
void testFloat() {
float x = 0;
System.out.print("float: ");
f1(x);f2(x);f3(x);f4(x);f5(x);f6(x);f7(x);
}
void testDouble() {
double x = 0;
System.out.print("double: ");
f1(x);f2(x);f3(x);f4(x);f5(x);f6(x);f7(x);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Main m = new Main();
m.testConstVal();m.testChar();m.testByte();m.testShort();
m.testInt();m.testLong();m.testFloat();m.testDouble();
}
}
/* Output:
5: f1(int) f2(int) f3(int) f4(int) f5(long) f6(float) f7(double)
char: f1(char) f2(int) f3(int) f4(int) f5(long) f6(float) f7(double)
byte: f1(byte) f2(byte) f3(short) f4(int) f5(long) f6(float) f7(double)
short: f1(short) f2(short) f3(short) f4(int) f5(long) f6(float) f7(double)
int: f1(int) f2(int) f3(int) f4(int) f5(long) f6(float) f7(double)
long: f1(long) f2(long) f3(long) f4(long) f5(long) f6(float) f7(double)
float: f1(float) f2(float) f3(float) f4(float) f5(float) f6(float) f7(double)
double: f1(double) f2(double) f3(double) f4(double) f5(double) f6(double) f7(double)
*///:~
??????????δ???????漰?????????????????:???洢?????????С????????????洢?????????????????.??testConstVal()?????п??????????.????????int = 5..???int?????.??f1()-f4()?ж??????????????int?????.??????f5()-f7()???????????????int????????????????????????????.??int = 5?????long??float??double.????????????????????????????????.???????????????????.??????????????????char????????????????char???????????????????char?????int????.
??????????:
public class Main {
void f1(char x) { System.out.print("f1(char)"); }
void f1(byte x) { System.out.print("f1(byte)"); }
void f1(short x) { System.out.print("f1(short)"); }
void f1(int x) { System.out.print("f1(int)"); }
void f1(long x) { System.out.print("f1(long)"); }
void f1(float x) { System.out.print("f1(float)"); }
void f1(double x) { System.out.print("f1(double)"); }
void f2(char x) { System.out.print("f2(char)"); }
void f2(byte x) { System.out.print("f2(byte)"); }
void f2(short x) { System.out.print("f2(short)"); }
void f2(int x) { System.out.print("f2(int)"); }
void f2(long x) { System.out.print("f2(long)"); }
void f2(float x) { System.out.print("f2(float)"); }
void f3(char x) { System.out.print("f3(char)"); }
void f3(byte x) { System.out.print("f3(byte)"); }
void f3(short x) { System.out.print("f3(short)"); }
void f3(int x) { System.out.print("f3(int)"); }
void f3(long x) { System.out.print("f3(long)"); }
void f4(char x) { System.out.print("f4(char)"); }
void f4(byte x) { System.out.print("f4(byte)"); }
void f4(short x) { System.out.print("f4(short)"); }
void f4(int x) { System.out.print("f4(int)"); }
void f5(char x) { System.out.print("f5(char)"); }
void f5(byte x) { System.out.print("f5(byte)"); }
void f5(short x) { System.out.print("f5(short)"); }
void f6(char x) { System.out.print("f6(char)"); }
void f6(byte x) { System.out.print("f6(byte)"); }
void f7(char x) { System.out.print("f7(char)"); }
void testDouble() {
double x = 0;
System.out.print("double argument:");
f1(x);f2((float)x);f3((long)x);f4((int)x);
f5((short)x);f6((byte)x);f7((char)x);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Main m = new Main();
m.testDouble();
}
}
/* Output:
????double argument:f1(double)f2(float)f3(long)f4(int)f5(short)f6(byte)f7(char)*///:~
??????????????????????????double = 0 ??????????в??????f2()-f7()????????double????????????????.?????漰??????????.??????к????????????????double?????????????float??long??int???????.????????????????????????У??????????????????????.????????????洢?????????????????????洢???????С??????.????????????????????????????.???????????????????.
????iv.????????
?????????????????????????????????????.??????????????????????????????????г??????????????????????????????????????.???????????????????ж????????????????????????????????????г??????????Java??????????????г?????????.
//?????е????????????????????????????????????.
void f(){
int i;
i++;  //Error
}
//???е???????????????????????????.
public class Main {
private int dint;
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println(new Main().dint);  //init 0
}
}
????v.????????????
?????????????????????Щ???????????????????????????????浥??????????洢?????????ж??????????.?????????????Χ?????.???????????????????.??????????????????????????????????????г?????????.
class Static{
public Static() {
// TODO Auto-generated constructor stub
}
public void Print(){
System.out.println("Static");
}
}
class TestStatic{
static Static s = new Static();
public TestStatic() {
// TODO Auto-generated constructor stub
s.Print();
s1.Print();
}
static Static s1 = new Static();
}
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
new TestStatic();
}
}
??????????????????????.????????????.???????????????JVM??????????????·??.??λ.class???(????????).???JVM??.class??????.????й?????????????????????????.(???????????Class??????μ?????????????).???????new????????JVM????????п????????棬??????????0????????????е???????г????.????й?????.