题目内容

Which of the following assignment statements is illegal?

A. int t = 23;
B. short s = 10;
C. float f = -34;
D. float f = 34.0;

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Analyzethefollowingcode.publicclassTest{publicstaticvoidmain(String[]args){intmonth=09;System.out.println("monthis"+month);}}

A. Theprogramdisplaysmonthis9.
B. Theprogramdisplaysmonthis09.
C. Theprogramhasasyntaxerror,because09isanincorrectliteralvalue.
D. Theprogramdisplaysmonthis9.0.

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Analyzethefollowingcode:publicclassTest{publicstaticvoidmain(String[]args){intn=100001000010000;System.out.println("nis"+n);}}

A. Theresultof10000*10000*10000istoolargetobestoredinanintvariablen.Thiscausesanoverflowandtheprogramisaborted.
B. Theresultof10000*10000*10000istoolargetobestoredinanintvariablen.ThiscausesanoverflowandtheprogramcontinuestoexecutebecauseJavadoesnotreporterrorsonoverflow.
C. Theprogramdisplaysnis1000000000000.
D. Theresultof10000*10000*10000istoolargetobestoredinanintvariablen.ThiscausesanunderflowandtheprogramcontinuestoexecutebecauseJavadoesnotreporterrorsonunderflow.

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规则标识符严格遵守标识符命名规则是（）

A. 由字母、数字、下划线、@、
B. 和$符号组成
C. 首字母不能为数字和$符号
D. 标识符不允许是保留字，标识符内不能出现空格和特殊字符，长度小于128个字符
E. 以上都是

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关于浮点型数据Decimal(p,s)的不正确说法（）

A. P为有效位数，其值等于整数位数和小数位数之和
B. P为有效位数，S为小数位数
C. P为整数部分位数，S为小数位数
D. S为小数位数，默认为0

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Which of the following assignment statements is illegal?

A. int t = 23; B. short s = 10; C. float f = -34; D. float f = 34.0;

Analyzethefollowingcode.publicclassTest{publicstaticvoidmain(String[]args){intmonth=09;System.out.println("monthis"+month);}}

Analyzethefollowingcode:publicclassTest{publicstaticvoidmain(String[]args){intn=10000*10000*10000;System.out.println("nis"+n);}}

规则标识符严格遵守标识符命名规则是（）

关于浮点型数据Decimal(p,s)的不正确说法（）

A. int t = 23;
B. short s = 10;
C. float f = -34;
D. float f = 34.0;

Analyzethefollowingcode:publicclassTest{publicstaticvoidmain(String[]args){intn=100001000010000;System.out.println("nis"+n);}}