Java 中可抛出的 getMessage()方法，示例
原文:https://www . geesforgeks . org/throwable-getmessage-method-in-Java-with-examples/
可投掷类的 getMessage() 方法用于返回可投掷对象的详细消息，也可以为空。可以使用此方法获取异常的详细信息作为字符串值。
语法:
public String getMessage()
返回值:该方法返回该可投掷实例的详细消息。
下面的程序演示了 java.lang.Throwable 类的 getMessage()方法
例 1:
// Java program to demonstrate
// the getMessage() Method.
import java.io.*;
class GFG {
// Main Method
public static void main(String[] args)
throws Exception
{
try {
// divide the numbers
divide(2, 0);
}
catch (ArithmeticException e) {
System.out.println("Message String = "
+ e.getMessage());
}
}
// method which divide two numbers
public static void divide(int a, int b)
throws ArithmeticException
{
int c = a / b;
System.out.println("Result:" + c);
}
}
Output:
Message String = / by zero
例 2:
// Java program to demonstrate
// the getMessage() Method.
import java.io.*;
class GFG {
// Main Method
public static void main(String[] args)
throws Exception
{
try {
test();
}
catch (Throwable e) {
System.out.println("Message of Exception : "
+ e.getMessage());
}
}
// method which throws UnsupportedOperationException
public static void test()
throws UnsupportedOperationException
{
throw new UnsupportedOperationException();
}
}
Output:
Message of Exception : null
参考文献: https://docs . Oracle . com/javase/10/docs/API/Java/lang/throwable . html # getMessage()
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