| 4. 2. 3. 用括号使您的'If'语句更清楚 |
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If there is only one statement in an if or else block, the braces are optional. |
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public class MainClass {
public static void main(String[] args) {
int a = 3;
if (a > 3)
a++;
else
a = 3;
}
}
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Consider the following example: |
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public class MainClass {
public static void main(String[] args) {
int a = 3, b = 1;
if (a > 0 || b < 5)
if (a > 2)
System.out.println("a > 2");
else
System.out.println("a < 2");
}
}
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- It is hard to tell which if statement the else statement is associated with.
- Actually, An else statement is always associated with the immediately preceding if.
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Using braces makes your code clearer. |
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public class MainClass {
public static void main(String[] args) {
int a = 3, b = 1;
if (a > 0 || b < 5) {
if (a > 2) {
System.out.println("a > 2");
} else {
System.out.println("a < 2");
}
}
}
}
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