动手动脑-异常
Posted kongfanbing
tags:
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public class CatchWho{
public static void main(String[] args) {
try {
try {
throw new ArrayIndexOutOfBoundsException();
}
catch(ArrayIndexOutOfBoundsException e) {
System.out.println( "ArrayIndexOutOfBoundsException" + "内层try-catch");
}
throw new ArithmeticException();
}
catch(ArithmeticException e) {
System.out.println("发生ArithmeticException");
}
catch(ArrayIndexOutOfBoundsException e) {
System.out.println( "ArrayIndexOutOfBoundsException" + "/外层try-catch");
}
}
}
输出：
ArrayIndexOutOfBoundsException/内层try-catch
发生ArithmeticException
多层的异常捕获-2
public class CathchWho2{
public static void main(String[] args) {
try {
try {
throw new ArrayIndexOutOfBoundsException();
}
catch(ArithmeticException e) {
System.out.println( "ArrayIndexOutOfBoundsException" + "内层try-catch");
}
throw new ArithmeticException();
}
catch(ArithmeticException e) {
System.out.println("发生ArithmeticException");
}
catch(ArrayIndexOutOfBoundsException e) {
System.out.println( "ArrayIndexOutOfBoundsException" + "外层try-catch");
}
}
}
ArrayIndexOutOfBoundsException/外层try-catch
import javax.swing.*;
class AboutException {
public static void main(String[] a)
{
int i=1, j=0, k;
k=i/j;
try
{
k = i/j; // Causes division-by-zero exception
//throw new Exception("Hello.Exception!");
}
catch ( ArithmeticException e)
{
System.out.println("被0除. "+ e.getMessage());
}
catch (Exception e)
{
if (e instanceof ArithmeticException)
System.out.println("被0除");
else
{
System.out.println(e.getMessage());
}
}
finally
{
JOptionPane.showConfirmDialog(null,"OK");
}
}
}
import javax.swing.*;
public class EmbedFinally{
public static void main(String args[]) {
int result;
try {
System.out.println("in Level 1");
try {
System.out.println("in Level 2");
// result=100/0; //Level 2
try {
System.out.println("in Level 3");
result=100/0; //Level 3
}
catch (Exception e) {
System.out.println("Level 3:" + e.getClass().toString());
}
finally {
System.out.println("In Level 3 finally");
}
// result=100/0; //Level 2
}
catch (Exception e) {
System.out.println("Level 2:" + e.getClass().toString());
}
finally {
System.out.println("In Level 2 finally");
}
// result = 100 / 0; //level 1
}
catch (Exception e) {
System.out.println("Level 1:" + e.getClass().toString());
}
finally {
System.out.println("In Level 1 finally");
}
}
}
import javax.swing.*;
public class EmbedFinally{
public static void main(String args[]) {
int result;
try {
System.out.println("in Level 1");
try {
System.out.println("in Level 2");
// result=100/0; //Level 2
try {
System.out.println("in Level 3");
result=100/0; //Level 3
}
finally {
System.out.println("In Level 3 finally");
}
// result=100/0; //Level 2
}
catch (Exception e) {
System.out.println("Level 2:" + e.getClass().toString());
}
finally {
System.out.println("In Level 2 finally");
}
// result = 100 / 0; //level 1
}
catch (Exception e) {
System.out.println("Level 1:" + e.getClass().toString());
}
finally {
System.out.println("In Level 1 finally");
}
}
}
package Tutorial9;
import java.util.*;
class yichang extends Exception{
}
class yichang1 extends Exception{
}
public class Zuoye {
static Zuoye A=new Zuoye();
public static void Dongnao(){
Scanner in=new Scanner(System.in);
System.out.print("请输入一个整数:");
int t=1;
int m1;
String m=in.next();
for(int i=0;i<m.length();i++){
if(m.charAt(i)<‘0‘||m.charAt(i)>‘9‘)
{
try{
throw new yichang();
}catch(yichang e){
t=0;
System.out.println("数字格式异常，重新输入");
break;
}
}
}
if(t==1){
m1=Integer.parseInt(m);
if(m1>100){
try{
throw new yichang1();
}catch(yichang1 e){
System.out.println("不合法，重新输入");
}
}
else{
if(m1<60){
System.out.println("不及格");
}
else if(m1>=60)
{
if(m1>65&&m1<75){
System.out.println("中");
}
else if(m1>=75&&m1<90){
System.out.println("良");
}
else if(m1>=90&&m1<=100){
System.out.println("优");
}
else{
System.out.println("及格");
}
}
}
}
else
A.Dongnao();
}
public static void main(String args[]){
while(true){
A.Dongnao();
}
}
}
3.结果截图:
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