자바에서 형 변환

String형 → 숫자형(int, double, float, long, short)

String sNum = "1234";

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int i1 = Integer.parseInt(sNum);

int i2 = Integer.valueOf(sNum);

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double d1 = Double.parseDouble(sNum);

double d2 = Double.valueOf(sNum);

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float f1 = Float.parseFloat(sNum);

float f2 = Float.valueOf(sNum);

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long l1 = Long.parseLong(sNum);

long l2 = Long.valueOf(sNum);

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short s1 = Short.parseShort(sNum);

short s2 = Short.valueOf(sNum);

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String형 → 배열

String sNum = "1234";

char[] cNum = sNum.toCharArray();

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숫자형(int, double, float, long, short) → String 형

int i = 1234;

String i1 = String.valueOf(i);

String i2 = Integer.toString(i);

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double d = 1.23;

String d1 = String.valueOf(d);

String d2 = Double.toString(d);

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float f = (float) 1.23;

String f1 = String.valueOf(f);

String f2 = Float.toString(f);

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long l  = 1234;

String l1 = String.valueOf(l);

String l2 = Long.toString(l);

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short s = 1234;

String s1 = String.valueOf(s);

String s2 = Short.toString(s);