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Java 范围类演示了字段和局部变量的范围。
范围类演示了字段和局部变量的范围。
实例源码：
源代码：
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public class Main {3
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// field that is accessible to all methods of this class5
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static int x = 1;// from NowJava.com7
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public static void main(String[] args) {10
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int x = 5; // method's local variable x shadows field x12
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System.out.printf("local x in main is %d%n", x);15
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useLocalVariable(); // useLocalVariable has local x18
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useField(); // useField uses class Scope's field x20
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System.out.printf("%nlocal x in main is %d%n", x);23
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}25
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// create and initialize local variable x during each call28
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public static void useLocalVariable() {30
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int x = 25; // initialized each time useLocalVariable is called32
//n o w j a v a . c o m - 时代Java33
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System.out.printf("%nlocal x on entering method useLocalVariable is %d%n",35
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x);37
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++x; // modifies this method's local variable x39
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System.out.printf("local x before exiting method useLocalVariable is %d%n",41
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x);43
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}45
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// modify class Scope's field x during each call48
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public static void useField() {50
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